CN101495299A - Ultraviolet activating system for preventing digital piracy from recording media - Google Patents
Ultraviolet activating system for preventing digital piracy from recording media Download PDFInfo
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- CN101495299A CN101495299A CNA2006800127665A CN200680012766A CN101495299A CN 101495299 A CN101495299 A CN 101495299A CN A2006800127665 A CNA2006800127665 A CN A2006800127665A CN 200680012766 A CN200680012766 A CN 200680012766A CN 101495299 A CN101495299 A CN 101495299A
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Abstract
The invention provides an optical medium piracy method and system, employing a ultraviolet-sensitive state-change material, capable of changing state upon activation with a wavelength of ultraviolet between 253+/-25 nm to 365+/-25 nm, the state-change material in association with digital data indicia, wherein when the state-change material is activated to change state by the ultraviolet radiation, the optical medium moves from an unreadable to a readable condition, or from a less readable to more readable condition.
Description
Related application
60/715071 the priority of submitting to 8,60/67345 and 2005 on September that the application requires the U.S. Provisional Patent Application No.60/672265 that submitted on April 18th, 2005, on April 21st, 2005 to submit to, the disclosure integral body of these patent applications is hereby incorporated by, under suitable occasion, be used to instruct details additional or as an alternative, feature and/or technical background, and require priority from each patent application.
Technical field
Present invention relates in general to protection, to avoid the piracy of any link on the distribution chain for the transmitted medium that stores the information that to read by reader.
Background technology
Such as the PDT R﹠D Representative of the content-data of the such software of visual and numerical data that can listen and other form a large amount of inputs of time and money.Such content-data is stored in the transferable storage medium with digital form usually, and then they are sold to the buyer.Unfortunately, for the transmitted recording medium of most conventional, might extract data from transferable storage medium in any link of its distribution chain.In addition, under the situation of the transmission capacity of given recording medium, from distribution chain in confidence move media also be easily usually.
Transferable recording medium is easy to be subjected to the theft of shop stealing and distribution chain inside especially.In stealing of the shop of point of sale and the theft in distribution chain is very big problem, has influenced dealer and consumer nocuously.According to estimates, for the stealing of the shop of all commodity, loss every year of retailer between 100 and 12,000,000,000 dollars, and spent extra 70 to 10,000,000,000 dollars in the measure that is preventing the shop stealing, comprise the safety means and the personnel that prevent the shop stealing.In order to compensate the cost of stealing in shop stealing and the distribution chain, distributors is transferred to the consumer to the form that these spend with the higher price of commodity.According to estimates, in the U.S., each family will be only because the shop stealing will be paid 200 dollars in retail commercial treaty to the retail price that commodity increase every year.
Because taking product without approval away, to cause the loss on supply chain also be very usual thing.According to estimates, the percentage in some field loss can reach 30 percent.
Taked many trials to solve to transmitting the piracy of the content-data on the recording medium.In one approach, sequence number is set in content-data, to allow to follow the tracks of the unwarranted copy of the content-data that has added sequence number.The problem of this method is that it needs external forced power to follow the tracks of illegal copies, and is seldom to use when article are not associated with the specific people.In addition, the assailant of many such systems finds to be easy to find and wipe sequence number.
In order to stop shop stealing and distribution chain theft, some entity has utilized electronic article supervision (EAS) system, and it comprises the transponder label (RFID etc.) that is attached on each purchase article.For transferable recording medium, such transponder label typically is associated with the packing of surrounding this medium.The EAS system also comprises the one or more electronic reader that are placed on the exit, is used for detecting transponder label.When article purchased or with authorization when distribution chain is removed, transponder label takes off or lost efficacy from article, and commodity can not send chimes of doom by reader.When the people attempted to take article away without permission, reader detected transponder label and is not removed or lost efficacy from article, and sends chimes of doom.
Because transferable recording medium usually is very little and is hidden easily, only by the recording medium of wanting is taken off, hides this medium, takes this medium snugly away then from its packing, just can tackle the EAS system at an easy rate.After medium was removed, the data on it can easily be replicated usually.Owing to some reasons have been got rid of the scheme that RFID directly is placed on digital recording medium, these reasons comprise the cost of recording medium, place RFID the difficulty that reads by packing to be provided and not to be gone through to use by the radio frequency that this system was adopted in some way in flight course.
Even when the dealer of commodity allows client or publisher having proof of purchase, also can freely return under the situation of commodity,, also may steal if the commodity of being returned are transported by the point of sale.Some people buys commodity or steals such commodity with lower selling price, then these commodity is returned to same dealer or other dealers to change or reimbursement, claims the full price of paying these commodity.For digital recording medium, may be downloaded the back in the content of digital recording medium and propose refund request.If the reimbursement of dealer's full price, then the dealer has also lost the number that surpasses purchasing price except handling the expense of returning commodity.
Be used to prevent that the pirate useful especially method from being to combine with one or more digital data indicia on medium, the variable material of introducing state on transferable digital recording medium, like this, reading of digital data indicia is changed when described state change material is activated, the state change occurs in desirable link place on the distribution chain, such as when selling, so that digital recording medium is transformed into readable or more readable state fully from or half readable state not readable by digital reader.Though this method provides very big hope,, when causing that state changes, can meet difficulty owing to surround the packing of most of digital medias.Such packing can comprise that this transparent membrane for example can comprise polyethylene, glassine paper or polypropylene film with the polypropylene shell of transparent membrane parcel.Digital recording medium is taken out from its packing, responds to cause the state change and then medium to be put back in the packing again that this is unpractiaca when many sold in retail for the state change material relevant with medium.So, need a kind of improved technology that causes that state changes and do not need digital media is taken out from pack.
Definition
" digital data indicia ": the mark that on digital recording medium, reads corresponding to numerical data.This mark be included in optics pit on the optical recording media and projection, the electromagnetic modification on floppy disk part, read and punch mark that the dyeing of the record that changes, representative data are read for numeral.
" digital reader ": anyly can detect and read the equipment that is stored in the digital information on the digital recording medium.
" digital recording medium ": can be with the digital form medium of any geometry of stored information (not necessarily circular) thereon.Digital recording medium includes but not limited to CD, DVD, HD-DVD, electromagnetism band and disc, flash drives and light medium.The information that is stored on the medium can include but not limited to software program, software data, audio file and video file.
" photoactivation state change material ": light wavelength or wavelet is long or luminous energy is applied to the state that back on the material changes measurable function of state changes material.
" light medium ": the medium that can store any geometry (not necessarily circular) of the mark that can read by optical pickup or content.
" optical pickup ": the reader (defining) that is used to read the light medium as following.
" permanent state change material ": in case after energy is applied to material, be activated into the measurable function of state of change, the state for good and all or in the time interval that prolongs under the state of sd so changes material.
" fast state change material ": activated the back changes to second state from first state in less than 1 minute state change material by activation of source, this two states can be distinguished by reader.
" reader ": the equipment that is used to read out in the data on the recording medium.So-called " reader " is meant and includes but not limited to player.For example CD and DVD player.
" voice activation state change material ": but the state that makes the measurement characteristics of material change after acoustic energy is applied to material changes material.
" state change material ": carry out material on the material and activate by energy is applied to, make the material that measurable characteristic of material changes.So-called " state change material " is meant the material that includes but not limited to that optical states after energy is applied to material (for example opacity and/or color) changes, the material that electromagnetic states after energy is applied to material (for example conduction state) changes, and the material that physical state (for example crystallization is to non-crystalline structure) changes after energy is applied to material.
" interim state change material ": in case but after energy is applied to material, be activated changing the measurement characteristics of material, and less than year at interval in state change material under the state of sd so.
" instantaneous state change material ": in case in the short time interval (a few minutes or less time) but in spontaneously activate changing the measurement characteristics of material, but and the state that loses this change in the measurement characteristics change material.It includes but not limited to applying behind the energy from first state transitions to second state and get back to the material of first state when not applying energy.
" transferable digital recording medium ": the enough hands of energy are delivered to the less relatively medium of another position from a position.It includes but not limited to CD, floppy disk, flash drive.
Remainder for disclosure should be understood that, wishes to use term as defined above, no matter whether such term is first use.
Summary of the invention
The present invention stipulated by apply with 253+/-25nm to 365+/-ultraviolet light source of the wavelength emission of 25nm activates transmitted recording medium readable, pirate protection on reader.In a certain embodiments, provide digital recording medium readable, pirate protection on digital reader.
CD and DVD plastic casing can comprise many materials, especially comprise polypropylene, and the shades of colour from transparent to black can be arranged.
In one embodiment of the invention, transferable recording medium is provided, added thereon combine with data markers on it, ultraviosensitive state is changed material, make prevention reading when ultraviosensitive state being changed material be in first state rather than second state to mark.In a digital embodiment, ultraviosensitive state is changed material combine with one or more digital data indicia on the medium, make that reading of digital data indicia is changed when described state change material is activated by ultraviolet light.This state change can (such as when selling) be caused at a desirable link place on the distribution chain, makes recording medium be transformed into readable or more readable state fully from or half readable state not readable by digital reader.By for example apply about 253+ of producing by the mercury light source/-25nm to about 365+/-ultraviolet light in the wave-length coverage of 25nm, when this medium is stored in study plot and is used for packing the polymer packaging of CD and DVD dish, such as, but not limited to acrylic acid and polyethylene, can cause the change that combines with digital recording medium, and not need to open the packing of medium ultraviosensitive state change material.In one aspect of the invention, box is not a black, that is, be not the color that is tending towards absorbing most of wavelength.
Sunshine may not have much about 253+/-25nm arrive about 365+/-ultraviolet light in the wave-length coverage of 25nm or the subrange wherein.So design is activated to medium with such wavelength and reads or half reading state may be favourable: promptly it avoids being activated by surrounding environment, but when license activation in fact (such as after retail) just be activated.
In one embodiment; can transmit recording medium is protected to avoid theft or digital recording medium is illegally moved into or shift out distribution chain; make state change material be activated into for such reading be necessary state before, medium is unreadable or can not reads fully.For digital recording medium, with state change one or more digital data indicia that material combines may be non-nominal or special (promptly, on physical arrangement be nominal but relevant with material, surrounding environment or the like, these are irrelevant with the normal data mark again), make that transferable digital recording medium is unreadable or not readable for some information.When changing material, the selection state makes that the non-nominal that combines with this material/special mark no longer stops the numerical data that reads on the medium when state change material is activated.
The specific embodiment
The present invention has stipulated can transmit on the recording medium so that prevention is read medium and the transmitted medium of the information of storing is protected before activating ultraviosensitive light change material, to avoid the piracy of any link on the distribution chain by ultraviolet light state change material is applied to.
Protection can be by allowing to make the data read of recording medium change to data read more completely from limited data read by using the ultraviolet energy source.In digital recording medium, state changes material and can combine with digital data indicia, makes when the state of material changes, and the data read of one or more relevant digital data indicia is changed.State changes material, especially material type aspect, can be that interim state changes material, instantaneous state change material, permanent state change material, fast state change material, the photoactivation state changes material and/or the voice activation state changes material.
The outside that state changes material activate preferably can by be created in ultraviolet ray range, especially 253+/-25nm to about 365+/-electromagnetic energy source between the 25nm, promptly by cause by reader readable, measurable state changes and make the data markers change relevant with it read or any energy source of reading state (for example, never can read readable).
In embodiment about digital recording medium, reading by state being changed material of one or more digital data indicia (for example is activated to different states, for the change of the light state of optical recording media, or for the change of the electromagnetic states of electromagnetic recording medium) and be changed.One or more digital data indicia can change material with state and combine.Can use more than one material, every kind of material reacts to identical ultraviolet wavelength, different ultraviolet wavelength or such ultraviolet wavelength and other energy activated source (such as another kind of wavelength).Such combination can be selectively, change material such as state and only combine with some digital data indicia on digital recording medium, perhaps state change material can be with great majority, all or almost all digital data indicia combine.
In one embodiment, a kind of method that is used for the piracy protection of digital recording medium is disclosed, comprise: obtain being packaged in the digital recording medium in the polymer shell, this digital recording medium comprises and combining with the digital data indicia of the effective or wrong reading state of expression, ultraviosensitive state is changed material, state changes material and combines with digital data indicia, make by 253+/-25nm to 365+/-when ultraviolet wavelength state of activation the 25nm changes material, the relevant digital data mark of being read by reader is as another effective or wrong state, perhaps another is read state and is read, and wherein the change of numerical data state allows more information to be read from digital recording medium by reader; And with 253+/-25nm to 365+/-25nm between the ultraviolet radiation of wavelength pass Package casing and point to digital recording medium.
In another embodiment, disclosing wherein, polymer shell comprises acrylic acid system.
Reading change can only finish at specific markers, these marks are for example based on the physical differences between mark (state that for example combines with nominal and non-nominal mark changes material), difference in the surrounding environment relevant with so special mark is (when for example comparing with the digital data indicia of whole recording medium, the compound that in the zone of special mark, exists or lose), perhaps for the selective response of some specific wavelength or energy transmission (for example some zone can comprise by 253+/-25nm to 365+/-wavelength in the 25nm scope activate ultraviosensitive state is changed material, this be with in other zone, find different to ultraviosensitive state change material).For digital recording medium, mark can be pit and/or a projection of representing the data of introducing on optical recording media, perhaps such as other such digital data indicia of the electromagnetism aberration on the electromagnetic recording medium.
In a kind of embodiment of specific digital recording medium, state changes material and combines with a kind of digital data indicia, and this digital data indicia is not the nominal digital data indicia for recording medium.For example, digital data indicia can be pit and/or projection, and it is not (standard) of nominal for disk format.Non-nominal digital data indicia in such embodiments perhaps by means of software or the firmware relevant with medium or reader, makes CD whole or local not readable for example by means of the algorithm for error correction relevant with medium.The state change material relevant with so non-nominal digital data indicia can be selected to cause when state changes the state change of material and stop the change of reading of reading (whole or local) so non-nominal digital data indicia, so that recording medium can whole or local being read (for example, by allowing to proofread and correct the data by algorithm for error correction read).Non-nominal digital data indicia can be represented or make the mistake and read or effectively read.For example, when the representative of non-nominal digital data indicia or make the mistake when reading, change material with its state that combines and can be selected to produce and effectively read or different error conditions, this is essential for whole the reading of light medium.In addition, for example, when non-sign digital data indicia was represented or caused active data to read, state changes material can be selected to make when activate usually for necessary another effective status of reading of medium or error condition.Whole the reading of medium can be under the control that is stored in the software program on the medium, in the hardware of reader, in the hardware or software relevant, perhaps can be the function (such as the CD correcting algorithm) of the algorithm for error correction relevant with the particular medium that is read with reader.
In another embodiment, recording medium is engineered to can not be play under original state, and perhaps the amount of digital information that can be read from medium by reader is limited.The activation of state change material is essential for reading or reading fully of medium.
In digital recording medium embodiment, existing light state to change under the situation of material, find unique pit and/or projection, it causes the uncorrectable error state when reading medium.When state changes material by when activating such as light source or the such suitable energy source of sound source, the reading and can be changed of unique pit or projection is so that the uncorrectable error state changes to the effective status that allows medium to be read.
The digital data indicia that makes digital recording medium not be read also can be effective state, it can provide fuzzy or read clearly, because with reader or coil one or more relevant algorithms and forbid reading digital recording medium (or part of digital recording medium).The activation that state changes material can make such effective status be transformed into another kind of effective status or error condition, owing to set up relevant algorithm with reader system or medium or firmware/hardware, this is essential for reading medium (or part medium) fully.Similarly, because such algorithm or firmware/hardware are set up,, only when changing material, state of activation produced in another error condition or effective status although digital data indicia may be an error condition.
In a digital data recording media embodiment, digital data recording media comprises digital data indicia, and its data read that makes the mistake forbids that medium is read or the part medium is read.In the time of under recording medium is exposed to the suitable energy source that is used for transition state change material, data read is changed to effective state, allows read-out recording medium.
In one embodiment, state changes material and is rotated coating or is placed on the whole digital recording medium, and material is selected as making it not influence reading of nominal digital data indicia, and only influences special digital data indicia.Different spin coating speed can be used on the point of spin coating (such as, for example apply 600RPM, stop at 2000RPM, and turn-off rotation 5000RPM).The special number data markers structurally can be different (for example with other digital data indicia on the digital recording medium, the pit of different yardsticks and/or shape and/or manufacturing), perhaps such special number data markers can combine with one or more materials that do not find for other digital data indicia, perhaps can be relevant one or more materials that lose of digital data indicia (that is, not being special digital data indicia) with other.For example, special digital data indicia may be irrelevant with the oxide remover, and this oxide remover is that to change other digital data indicia that material combines relevant with state.Such oxide remover can Fast transforms be returned its original state so that state changes material, and to change material permanent or remain on state of activation in considerable time at interval and lack such oxide remover state that may make.State changes material can change into all nominals are read in permission on digital media digital data indicia, (it can be " digital data indicia is read in prevention " except those special digital data indicia, it is the mark that stops medium to read on reader), though they can have the structure identical with other nominal digital data indicia, lack in their environment for change state suitable in the material at state and change necessary or change one section necessary one or more material of the time interval of wanting for the state that keeps activating.Therefore, for special digital data indicia, the minor structure of the through engineering approaches on digital recording medium (non-nominal digital data indicia) may not need to realize this embodiment of the present invention.
State change material alternatively (or with rotation apply combined, or be placed on the surface of recording medium) can be included in the suitable digital recording medium.For example, record dyeing can be mixed to and make in the Merlon ball of digital recording medium being used to.
State changes material, such as quantum dyeing, can be placed explicitly with all or nearly all digital data indicia on digital recording medium.State changes material can be selected as making that the mark with such is associated, and promptly digital recording medium can not be read, but the state change allows to read digital recording medium after activation.
State changes material can influence reflection or refraction on the light medium for example in one embodiment.
In one application, data carrier is placed in the packing, and this packing comprises polypropylene and/or polyethylene, and perhaps ultraviolet wavelength is passed other material of its emission.To ultraviosensitive state change material be selected as for pass with the energy level transmission of expection at given selected emission source packing, 253+/-25nm to 365+/-ultraviolet light sensitivity in the scope of 25nm, such as the situation of Amray.After material activates, digital data indicia reads mode with a kind of necessity and is changed that (mistake changes to effectively, effectively change to effectively, effectively change to mistake, mistake changes to mistake, and readable changing to is unreadable, and vice versa), software control or algorithm for error correction have been supposed given, in more reliable mode or allow medium to read fully or firmware/hardware is set up.
When employing was carried out the piracy protection to ultraviosensitive state change material, by activating selectively with correct ultraviolet frequencies when checking, initial unreadable recording medium can be changed into readable.The activation that state changes material can involve 253+/-25nm to 365+/-the interior single or multiple ultraviolet wavelengths of scope of 25nm.For example, activation can so that be in the CD of error condition or non-readable state become correctly play, be in the CD under effective status or the readable state.
For the retail purpose of such digital recording medium, activate preferably permanent and non-reversible usually.
By the activation of having a mind in such ultraviolet range, digital recording medium can be designed to not be activated or be not easy under sunshine be activated.State changes the selection of material (for example can consider minimum activationary time, when retail is provided with, activating preferably can be less than 1 minute), the cost (it preferably can be added on the totle drilling cost of product rarely) of material and it is for the influence (it can be minimized, unless wish medium mis-behave on time frame in the future) of the long-term behaviour of digital recording medium.Behind the energy of given emission source and it, can change material by selection mode, a plurality of to allow once to activate/pile up/CD of layering.
May wish from being fabricated onto the protection of retail terminal.If activating is during this time to carry out, activate preferably simple and reliable when retail is provided with.May be preferably, recording medium is not easy to be reversed through engineering approaches (for example, being difficult to chemical characteristic or the alternative state change material that reproduction state changes material).Under a useful retail situation, before retail, do not activate the recording medium in the supply chain, and the activation mechanism when check can be designed to be difficult to detect or reverse engineered.
When on recording medium, adopting digital data indicia special or non-nominal, it may be unique, digital data indicia special or non-nominal be can adopt,, RFID and other such label therefore can be used to replace to follow the tracks of and to track and the authentication of digital recording medium.
State changes material or digital data indicia special or non-nominal can ad hoc be placed.For example, when using non-nominal pit, they can be placed on leading zone, help active region is concentrated and focused on to light wave.State change material can be during the recording medium manufacturing or is placed afterwards.For example, state changes material and can be placed on the casting die part before metallization and joint, perhaps can be added on the digital recording medium in sputter coating during the digital recording medium manufacturing.
Recording medium for example can be CD (as CD, DVD, DVD-R, Blu-Ray), tape, floppy disk or the like.Recording medium can be stored the data of numeral and/or analog form.
Activation can be in distribution chain or make any link on the chain, such as in the retail point.Activation can be undertaken by the ultraviolet radiation in the designated spectrum scope before passing to the buyer, and the distribution after also may needing other to activate is such as allowing the buyer to read all or a part of data at home.For example, further activation can be by entering into the website, to determine for activating required password or the out of Memory of digital recording medium.Similarly, except activating by ultraviolet source, activation can enter into any link of distribution chain or manufacturing chain by the website.
For example
Can get the UV spectrum of standard CD plastic casing.Representative plastic casing may be displayed on the poor absorption at 253.7nm place, the absorption at 365.0nm place 80%, and about 50% the absorption at the 296.7nm place.
Statement about preferred embodiment
Preferred embodiment describes though The present invention be directed to, and those skilled in the art are readily appreciated that, can make various changes and/or modification for the present invention, and can not deviate from the subject or scope of the present invention as being defined by the following claims.Here all documents of institute's combination are being hereby incorporated by reference, and are used to instruct details, feature and/or technical background additional or that replace under suitable occasion.
Claims (10)
1. the method for a piracy protection that is used for digital recording medium comprises:
Obtain being packaged in the digital recording medium in the polymer shell, described digital recording medium comprises what the digital data indicia of or error condition effective with expression combined, ultraviosensitive state is changed material, described state changes material and combines with described digital data indicia by this way, make by 253+/-25nm to 365+/-when ultraviolet wavelength state of activation the 25nm changes material, the relevant digital data indicia of being read by reader as another effectively or error condition, perhaps be read, and wherein the change of numerical data state allows to read more information by reader from digital recording medium as another reading state;
Wavelength 253+/-25nm to 365+/-ultraviolet radiation between the 25nm passes described Package casing and is directed to digital recording medium.
2. the process of claim 1 wherein that polymer shell comprises polypropylene.
3. the process of claim 1 wherein that polymer shell comprises polyethylene.
4. the method for claim 2, wherein the polymer shell packing is with the thin polymer film parcel, and ultraviolet radiation is guided through thin polymer film and polymer shell packing.
5. the method for claim 4, wherein thin polymer film is to select from comprise one or more groups of following material: polyethylene, glassine paper and polypropylene.
6. the system of a piracy protection that is used for digital recording medium, described system comprises:
Be packaged in the digital recording medium in the polymer shell, described digital recording medium comprises what the digital data indicia of or error condition effective with expression combined, ultraviosensitive state is changed material, described state changes material and combines with described digital data indicia in the following manner, make by 253+/-25nm to 365+/-when ultraviolet wavelength state of activation the 25nm changes material, the relevant digital data indicia of being read by reader as another effectively or error condition, perhaps be read as another reading state, wherein the change of numerical data state allows to read more information by reader from digital recording medium; And
Emission 253+/-25nm to 365+/-the ultraviolet radiation transmitter of wavelength between the 25nm, can be transmitted into such ripple packaged digital recording medium.
7. the system of claim 6, wherein said polymer shell comprises polypropylene.
8. the system of claim 6, wherein said polymer shell comprises polyethylene.
9. the system of claim 7, wherein said polymer shell packing is wrapped up with thin polymer film.
10. the system of claim 9, wherein said thin polymer film is to select from comprise one or more groups of following material: polyethylene, glassine paper and polypropylene.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US67226505P | 2005-04-18 | 2005-04-18 | |
| US60/672,265 | 2005-04-18 | ||
| US60/673,456 | 2005-04-21 | ||
| US60/715,071 | 2005-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101495299A true CN101495299A (en) | 2009-07-29 |
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ID=40925352
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200680012767XA Pending CN101500793A (en) | 2005-04-18 | 2006-04-14 | Piracy protected recording media |
| CNA2006800127665A Pending CN101495299A (en) | 2005-04-18 | 2006-04-14 | Ultraviolet activating system for preventing digital piracy from recording media |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200680012767XA Pending CN101500793A (en) | 2005-04-18 | 2006-04-14 | Piracy protected recording media |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN101500793A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101495300B (en) * | 2005-03-21 | 2013-05-15 | 索尼株式会社 | Deterring theft of optical media |
-
2006
- 2006-04-14 CN CNA200680012767XA patent/CN101500793A/en active Pending
- 2006-04-14 CN CNA2006800127665A patent/CN101495299A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101495300B (en) * | 2005-03-21 | 2013-05-15 | 索尼株式会社 | Deterring theft of optical media |
| CN103268770A (en) * | 2005-03-21 | 2013-08-28 | 索尼株式会社 | Deterring theft of optical media |
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| Publication number | Publication date |
|---|---|
| CN101500793A (en) | 2009-08-05 |
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