CN107342494A - A kind of new USB reads equipment - Google Patents
A kind of new USB reads equipment Download PDFInfo
- Publication number
- CN107342494A CN107342494A CN201710010260.0A CN201710010260A CN107342494A CN 107342494 A CN107342494 A CN 107342494A CN 201710010260 A CN201710010260 A CN 201710010260A CN 107342494 A CN107342494 A CN 107342494A
- Authority
- CN
- China
- Prior art keywords
- reading
- contiguous block
- usb
- inner chamber
- pedestal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/631—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for engagement only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/633—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only
Abstract
The invention discloses a kind of new USB to read equipment, including provided with reading inner chamber（2）Reading pedestal（1）And by the reading inner chamber（2）With the reading pedestal（1）The mutually link slot for the company of passing through（3）, the link slot（3）In plugged together USB connection groups, the USB connections group includes USB heads（4）And it is arranged on the USB heads（4）The contiguous block on right side（5）, the contiguous block（5）Left side pass through center line below（6）With the USB heads（4）Connect turnablely, the contiguous block（5）With the USB heads（4）Between be provided with a wear plate（7）, the contiguous block（5）Left side top be provided with a reading groove（8）, the contiguous block（5）Right side be provided with a junction piece below（10）, the contiguous block（5）Right side top be provided with a magnetite（9）.
Description
Technical field
The present invention relates to field of information communication, more particularly to a kind of new USB reads equipment.
Background technology
USB is a kind of technical specification of input/output interface, is widely used in the letter such as PC and mobile device
Cease communication product.USB connection is fixed by single insert-type at present, the problem of easy loose or dislocation in connection end be present, by mistake
It is even more to happen occasionally to draw situation about dragging by mistake, directly affects the reading and transmission of data and file, unnecessary fiber crops are caused to people
Tired and loss.
The content of the invention
The technical problem to be solved in the present invention is to provide one kind can realize automatically data connection and by mistake draw drag by mistake when it is anti-breaking
From new USB read equipment.
To solve the above problems, the present invention adopts the following technical scheme that：
A kind of new USB of the present invention reads equipment, including provided with the reading pedestal for reading inner chamber and by the reading inner chamber
With the link slot of the reading pedestal mutually company of passing through, USB connection groups have been plugged together in the link slot, the USB connections group includes USB
Head and the contiguous block being arranged on the right side of the USB heads, the left side of the contiguous block can be turned over by center line and the USB heads below
Turn ground connection, a wear plate is provided between the contiguous block and the USB heads, the left side top of the contiguous block is provided with one
Groove is read, the right side of the contiguous block is provided with a junction piece below, and the right side top of the contiguous block is provided with a magnetite；Institute
State read inner chamber left side be provided with below a read head with it is described read pedestal be fixedly connected, the read head to it is described
Read groove to coordinate to realize that data connect, oblique leading-in device, the tiltedly leading-in device bag are provided with the left position of the link slot
Include and the link slot mutually pars infundibularis for the company of passing through and the crashworthiness paster being arranged on the pars infundibularis surface, the reading inner chamber
Right side among the reading pedestal in be provided with rotation direction set turnablely, be provided with the rotation direction set to be connect with described
What conjunction block was engaged connects a groove, the rotation direction set right side and the transmission axle upset for the actuating unit being arranged in the reading pedestal
Connection, passes through to be connected with the following reading pedestal in right side for reading inner chamber and is equipped with a hollow cavity, the hollow cavity
In be provided with power packages, the power packages include being arranged on the iron prop on the read head opposite, and the outer of the iron prop is laterally set
There is the line of induction, a piston rod is connected with the right side of the iron prop, the right side of the piston rod is with being arranged on the hollow cavity bottom
The pneumatic cylinder in portion is connected with each other, the center line, junction piece, actuating unit transmission axle, connect the middle line overlap of a groove and rotation direction set,
Thus, when plugging together USB connection groups, by the junction piece and the cooperation for connecing a groove, the actuating unit is controlled to drive
The contiguous block is turned to lower section from top so that the reading groove mutually echoes with the read head, the magnetite and the iron
Post mutually echoes, and then the line of induction has electric current to flow through so that iron prop generation magnetic force attracts the magnetite, then controls described
Air pressure cylinder working so that the piston rod is stretched out and promotes the contiguous block to the left, and now whole USB connections group is all transported to the left
It is dynamic, until the reading groove and read head cooperation data communication, control the pneumatic cylinder to be stopped；Needing to extract
During USB connection groups, the pneumatic cylinder is controlled to work on so that the piston rod is retracted and by contiguous block push-and-pull to the right
Dynamic, now whole USB connections group all moves right, and until the junction piece and a groove that connects coordinate, controls the pneumatic cylinder
It is stopped, controls the sensing line current to stop, the iron prop magnetic force disappears, and then controls the actuating unit to drive described
Contiguous block is turned to top from below, then USB connections group is extracted, and the reading base top surface opening position that keeps left is provided with
Optical flame detector, described read are provided with LED at pedestal left surface upper position, the optical flame detector can incite somebody to action when ambient light is dim
Information transmission is to the LED and lights the LED so as to be accurately aligned with access slot when convenient use person plugs together.
Preferable technical scheme, four faces up and down of the pars infundibularis are tiltedly set outside to inside from the link slot, and tiltedly
If angle is 50 degree of angles, the left side area of the pars infundibularis is more than the right side area of the pars infundibularis, the right flank of the pars infundibularis
For product as the left side area of the link slot, the crashworthiness paster is glued at up and down on four faces of the pars infundibularis.
Preferable technical scheme, the USB heads are identical with the section of contiguous block and are upright profile, and a groove that connects is
Upright shape, the junction piece are upright shape.
Cemented fixed, the right-hand member of the wear plate is glued in preferable technical scheme, the left side of the wear plate with the USB heads
Face and the contiguous block end face are adjoint, and the center line runs through the wear plate.
Preferable technical scheme, the reading inner chamber is right prism, and the section for reading inner chamber is upright profile, and
The section for reading inner chamber is more than the border when contiguous block is overturn, so that the contiguous block can be by the power
Mechanism drives upset.
The beneficial effect that the new USB of the present invention reads equipment is：Pass through the junction piece for connecing a groove and upright shape of upright shape
Mutual cooperation enable actuating unit to drive contiguous block to overturn, contiguous block is driven from top by actuating unit and is turned to down
Side, then control pressure cylinder working, contiguous block side-to-side movement is driven by piston rod, can realize that the data for reading groove and read head connect
Connect or the disconnection of data connection is, it is necessary to when extracting USB connection groups, drive contiguous block to be turned to from below by actuating unit
Side, contiguous block goes to state when plugging together, in order to extract USB connection groups；The structure of whole equipment is simple, can ensure to run
Reliable and cost is low, considerably increases the stability of data connection, effectively prevent because drawing is dragged and causes USB joint by mistake by mistake
Depart from the generation for the phenomenon for reading equipment.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the internal structure schematic diagram that the new USB of the present invention reads equipment, wherein, USB connection groups plug together link slot
In；
Fig. 2 is junction piece in Fig. 1 and connects a structural representation when groove coordinates；
Fig. 3 be Fig. 2 in actuating unit drive contiguous block from top be turned to lower section after structural representation；
Fig. 4 is the structural representation that power packages promote when reading data communication after groove coordinates with read head in Fig. 3；
Fig. 5 is the cross section structure diagram of the direction of arrow in Fig. 1；
Fig. 6 is the cross section structure diagram of the direction of arrow in Fig. 4；
Fig. 7 is the external structure schematic diagram that the new USB of the present invention reads equipment；
Fig. 8 is the structural representation at link slot left position in Fig. 1；
Fig. 9 is that the later structural representation of crashworthiness paster is set in Fig. 8.
Embodiment
The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
Refering to shown in Fig. 1-9, a kind of new USB of the invention reads equipment, including provided with the reading pedestal for reading inner chamber 2
1 and the link slot 3 of company is passed through into the reading inner chamber 2 and the phase of pedestal 1 that reads, USB connections have been plugged together in the link slot 3
Group, the USB connections group include USB first 4 and are arranged on the contiguous block 5 on first 4 right sides of the USB, the left side of the contiguous block 5
Below by center line 6 and the USB first 4 it is turnable be connected, it is wear-resisting to be provided with one between the contiguous block 5 and the USB first 4
Piece 7, the left side top of the contiguous block 5 are provided with a reading groove 8, and the right side of the contiguous block 5 is provided with a junction piece below
10, the right side top of the contiguous block 5 is provided with a magnetite 9；The left side for reading inner chamber 2 is provided with a read head 81 below
It is fixedly connected with the reading pedestal 1, the read head 81 is described to coordinate with the reading groove 8 to realize that data are connected
Oblique leading-in device is provided with the left position of link slot 3, the tiltedly leading-in device includes the pars infundibularis that company is passed through with the phase of link slot 3
51 and the crashworthiness paster 52 that is arranged on the surface of pars infundibularis 51, the reading among the right side for reading inner chamber 2
Rotation direction set 12 is provided with pedestal 1 turnablely, is provided with to be engaged with the junction piece 10 in the rotation direction set 12
A groove 13 is connect, the transmission axle upset of actuating unit 11 of the right side of rotation direction set 12 with being arranged in the reading pedestal 1 couples,
Pass through to be connected with the following reading pedestal 1 in the right side for reading inner chamber 2 and be equipped with a hollow cavity 21, the hollow cavity 21
In be provided with power packages, the power packages include being arranged on the iron prop 24 on the opposite of read head 81, the outside of the iron prop 24
A piston rod 23 is connected with to the right side provided with the line of induction 25, the iron prop 24, the right side of the piston rod 23 is with being arranged on institute
The pneumatic cylinder 22 for stating the bottom of hollow cavity 21 is connected with each other, the center line 6, junction piece 10, actuating unit 11 transmission axle, connect position
The middle line overlap of groove 13 and rotation direction set 12, thus, when plugging together USB connection groups, a groove is connect with described by the junction piece 10
13 cooperation, control the actuating unit 11 drive the contiguous block 5 from top be turned to lower section so that it is described reading groove 8 with
The phase of read head 81 is echoed, and the magnetite 9 echoes with the phase of iron prop 24, then the line of induction 25 there is electric current to flow through so that
The iron prop 24 generates magnetic force and attracts the magnetite 9, then controls the pneumatic cylinder 22 to work so that the piston rod 23 stretches out simultaneously
The contiguous block 5 is promoted to the left, now whole USB connections group is all to left movement, until the reading groove 8 and the read head
81 coordinate data communication, control the pneumatic cylinder 22 to be stopped；When needing to extract USB connection groups, the pneumatic cylinder is controlled
22 are worked on so that the piston rod 23 is retracted and moves the push-and-pull to the right of contiguous block 5, and now whole USB connections group is all
Move right, until the junction piece 10 and the groove 13 that connects coordinate, control the pneumatic cylinder 22 to be stopped, described in control
The electric current of the line of induction 25 stops, and the magnetic force of iron prop 24 disappears, and then controls the actuating unit 11 to drive the contiguous block 5 under
Side is turned to top, then USB connections group is extracted, and the reading top surface of pedestal 1 opening position that keeps left is provided with optical flame detector 14,
LED 15 is provided with the reading pedestal 1 left surface upper position, the optical flame detector 14 will can be believed when ambient light is dim
Breath passes to the LED 15 and lights the LED 15 so as to be accurately aligned with access slot when convenient use person plugs together.
Wherein, four faces up and down of the pars infundibularis 51 are tiltedly set outside to inside from the link slot 3, and tiltedly set angle as 50
Angle is spent, the left side area of the pars infundibularis 51 is more than the right side area of the pars infundibularis 51, the right side area of the pars infundibularis 51
As the left side area of the link slot 3, the crashworthiness paster 52 is glued at four faces up and down of the pars infundibularis 51
On, when being plugged together by the oblique leading-in device of setting to prevent the USB connections group in the link slot 3 because of very little error institute
State and hit between contiguous block 5 and the reading pedestal 1, avoid the contiguous block 5 because of shock and so that surface sustains damage,
Facilitate the USB connections group to plug together rapidly to engage in the link slot 3.
Wherein, cemented fixed, the right side of the wear plate 7 and institute are glued in the left side of the wear plate 7 with the USB first 4
It is adjoint to state the end face of contiguous block 5, the center line 6 runs through the wear plate 7.
Wherein, the USB first 4 is identical with the section of contiguous block 5 and is upright profile, and the groove 13 that connects is Founder
Shape, the junction piece 10 are upright shape, dynamic by the mutual cooperation of junction piece 10 for connecing a groove 13 and upright shape of upright shape
Force mechanisms 11 can drive contiguous block 5 to overturn.
Wherein, the reading inner chamber 2 be right prism, and the section for reading inner chamber 2 is the profile of Founder, and the reading
The section of inner chamber 2 is more than the border when contiguous block 5 is overturn, so that the contiguous block 5 can be by the actuating unit
11 drive upset, avoid the contiguous block 5 from being collided when overturning with the inwall for reading inner chamber 2.
When needing to read information, first the USB connection groups of communication product are plugged together link slot 3 and are pushed into and are read in inner chamber 2,
So that junction piece 10 and connecing the cooperation of a groove 13, then the work of actuating unit 11 is controlled to drive contiguous block 5 to be turned to lower section from top,
Echoed so that reading groove 8 and the phase of read head 81, and magnetite 9 and the concord of the phase of iron prop 24, then control the line of induction 25 to there is electric current to flow through to make
Obtain iron prop 24 and generate magnetic force attraction magnetite 9 so that attract to fix between iron prop 24 and magnetite 9, then control pressure cylinder 22 works, and makes
Obtain piston rod 23 to stretch out to the left and promote contiguous block 5 to the left, now whole USB connections group is promoted by piston rod 23 and transported to the left
Dynamic, the data communication after reading groove 8 and coordinating with read head 81, then control pressure cylinder 22 are stopped, and now complete reading
Groove 8 is connected with the data of read head 81, and data can normally be read, even if occurring drawing the generation for dragging phenomenon by mistake, USB joint by mistake
Without departing from reading equipment；When needing electric current to stop and needing to extract USB connection groups, first control pressure cylinder 22 works so that
Piston rod 23 is retracted into hollow cavity 21, and piston rod 23 can pull contiguous block 5 to the right when retracting, now whole USB connections group
Pulled by piston rod 23 and moved right, until junction piece 10 coordinates with connecing a groove 13, now reading groove 8 disconnects with read head 81
Data connect, and USB joint, which departs from, reads equipment, then control pressure cylinder 22 is stopped, then controls the electric current of the line of induction 25 to stop, sense
The electric current of line 25 is answered to stop that the magnetic force of iron prop 24 is disappeared, the attraction between iron prop 24 and magnetite 9, which is fixed, to be released, and then controls power
The work drive of mechanism 11 drives contiguous block 5 to be turned to top from below, and then USB connections group is extracted link slot 3 by can.
The beneficial effect that the new USB of the present invention reads equipment is：Pass through the junction piece for connecing a groove and upright shape of upright shape
Mutual cooperation enable actuating unit to drive contiguous block to overturn, contiguous block is driven from top by actuating unit and is turned to down
Side, then control pressure cylinder working, contiguous block side-to-side movement is driven by piston rod, can realize that the data for reading groove and read head connect
Connect or the disconnection of data connection is, it is necessary to when extracting USB connection groups, drive contiguous block to be turned to from below by actuating unit
Side, contiguous block goes to state when plugging together, in order to extract USB connection groups；The structure of whole equipment is simple, can ensure to run
Reliable and cost is low, considerably increases the stability of data connection, effectively prevent because drawing is dragged and causes USB joint by mistake by mistake
Depart from the generation for the phenomenon for reading equipment.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (5)
1. a kind of new USB reads equipment, it is characterised in that：Including the reading pedestal provided with reading inner chamber and inner chamber will be read
Link slot with reading the pedestal mutually company of passing through, USB connection groups has been plugged together in link slot, USB connections group includes USB heads and is arranged on
Contiguous block on the right side of USB heads, the left side of contiguous block below by center line and USB heads it is turnable be connected, contiguous block and USB heads it
Between be provided with a wear plate, the left side top of contiguous block is provided with a reading groove, and the right side of contiguous block is provided with an engagement below
Block, the right side top of contiguous block are provided with a magnetite；The left side of reading inner chamber is provided with a read head and consolidated with reading pedestal below
Fixed connection, read head are provided with oblique leading-in device coordinating with reading groove to realize that data are connected at the left position of link slot,
Oblique leading-in device include with the link slot mutually pars infundibularis for the company of passing through and the crashworthiness paster being arranged on pars infundibularis surface, read inner chamber
Rotation direction set is provided with reading pedestal among right side turnablely, is provided with rotation direction set and is connect to what is be engaged with junction piece
Position groove, the transmission axle upset that the actuating unit in pedestal is read on rotation direction set right side with being arranged on couple, read under the right side of inner chamber
Pass through to be connected with the reading pedestal on side and be equipped with a hollow cavity, power packages are provided with hollow cavity, power packages include being arranged on institute
The iron prop on read head opposite is stated, the outer of iron prop is laterally provided with the line of induction, a piston rod is connected with the right side of iron prop, piston rod
Right side and be arranged on hollow cavity bottom pneumatic cylinder be connected with each other, center line, junction piece, actuating unit transmission axle, connect a groove
With the middle line overlap of rotation direction set, the reading base top surface opening position that keeps left is provided with optical flame detector, the reading pedestal left surface
LED is provided with upper position.
2. new USB according to claim 1 reads equipment, it is characterised in that：Four up and down of the pars infundibularis
Face is tiltedly set outside to inside from the link slot, and tiltedly sets angle as 50 degree of angles, and the left side area of pars infundibularis is more than the right flank of pars infundibularis
Product, for the right side area of pars infundibularis as the left side area of link slot, crashworthiness paster is glued at four up and down of pars infundibularis
On face.
3. new USB according to claim 1 reads equipment, it is characterised in that：The section phase of the USB heads and contiguous block
Profile that is same and being Founder, it is upright shape to connect a groove, and junction piece is upright shape.
4. new USB according to claim 1 reads equipment, it is characterised in that：The left side of the wear plate and USB heads
Viscous cemented fixed, the right side and contiguous block end face of wear plate are adjoint, and center line runs through the wear plate.
5. new USB according to claim 1 reads equipment, it is characterised in that：The reading inner chamber is right prism, is read
The section of inner chamber is upright profile, and the section for reading inner chamber is more than border when contiguous block is overturn, so that contiguous block
Upset can be driven by actuating unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710010260.0A CN107342494A (en) | 2017-01-06 | 2017-01-06 | A kind of new USB reads equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710010260.0A CN107342494A (en) | 2017-01-06 | 2017-01-06 | A kind of new USB reads equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107342494A true CN107342494A (en) | 2017-11-10 |
Family
ID=60223258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710010260.0A Withdrawn CN107342494A (en) | 2017-01-06 | 2017-01-06 | A kind of new USB reads equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107342494A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879187A (en) * | 2018-07-04 | 2018-11-23 | 杭州前茂保健食品有限公司 | Storage card plug assembly with safeguard function |
| CN108933374A (en) * | 2018-07-16 | 2018-12-04 | 杭州前茂保健食品有限公司 | A kind of storage card safety plugging device |
| CN108987995A (en) * | 2018-07-16 | 2018-12-11 | 杭州前茂保健食品有限公司 | A kind of storage card safety plugging device with safeguard function |
-
2017
- 2017-01-06 CN CN201710010260.0A patent/CN107342494A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879187A (en) * | 2018-07-04 | 2018-11-23 | 杭州前茂保健食品有限公司 | Storage card plug assembly with safeguard function |
| CN108933374A (en) * | 2018-07-16 | 2018-12-04 | 杭州前茂保健食品有限公司 | A kind of storage card safety plugging device |
| CN108987995A (en) * | 2018-07-16 | 2018-12-11 | 杭州前茂保健食品有限公司 | A kind of storage card safety plugging device with safeguard function |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171110 |
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| WW01 | Invention patent application withdrawn after publication |