JP2006154957A - Method of and composite recording medium for information retrieval - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently acquire necessary information from a database in which enormous patent information or the like is accumulated. <P>SOLUTION: In a method of information retrieval, information retrieved under unprescribed conditions by a computer 2 from a database 1 is recorded to the reversible visible-information recording medium 4 of a composite recording medium 3 by means of a writing device 5, and an identification code is read from the noncontact IC tag 6 of the composite recording medium 3 by means of reading device 7 and is recoded to a memory. Then, a person (not shown) reads information displayed on a composite recording medium 3 and optionally selects the composite recording medium 3, and the identification code is read from the noncontact IC tag 6 of the selected composite recording medium 3 by means of the reading device 7, and a database of the selected information is re-configured. A database of the information, which has gone through a series of retrieval processes mentioned above one or more times, is acquired, or a reversible visible-information recording medium 4, which is printed, is acquired. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an information search method from a database storing a huge amount of information such as patent information and an information search composite recording medium used therefor.

  In recent years, when investigating patent publications and other patent information of required technical contents from a database of patent information to which more than 400,000 patent publications are added every year, Searching by keyword or searching by patent classification has increased.

  When searching for information from a database storing a huge amount of information such as patent information, the number of information extracted by gradually narrowing down according to the search conditions can be reduced. It is necessary to confirm the contents, and if the amount of information is too large at that time, the confirmation work becomes complicated.

  Also, if all of the huge amount of extracted information is printed on paper, most of this printed material is discarded after being read in the search process, which is a waste of papermaking resources and concerns about negative effects on the environment. Is done.

  As a so-called rewritable recording material that can be used by rewriting information many times, there is one that reversibly changes its transparency by adjusting the heating temperature, that is, a low molecular weight organic compound in the resin matrix There is known a reversible thermosensitive recording material capable of forming a visible image by dispersing a transparent material to change a transparent state and a cloudy state (Patent Document 1).

  Also known is a reversible thermosensitive recording material called a leuco dye that contains an electron donating compound that has a lactone ring in the leuco molecular structure and opens the lactone ring by electron emission to bring about a structural change. (Patent Documents 2 and 3).

  By the way, a search method is known in which information on an IC tag is read by a reader to search for management of a patient chart with an IC tag or a gravure plate (Patent Documents 4 and 5). In addition, a combination of a non-contact IC and a rewritable medium has been put to practical use as a ticket such as a ski lift or a rewritable paper with a built-in IC.

JP-A-63-41186 JP-A-2-188293 JP-A-5-124360 JP 2002-230497 A JP 2002-230491 A

  However, the above-mentioned conventional rewritable medium with a built-in IC is merely provided with a small card-like rewritable medium that displays the information of the IC tag input from the beginning, that is, a product or document with an IC tag. Was to manage the whereabouts.

  Since the IC tag installed for such a purpose has a limited screen area for managing the location of products and documents, it is not easy to compare and judge two or more pieces of information. In addition, when a large amount of information is printed, a large amount of printing paper is required, and a large amount of unnecessary printed matter is generated after one reading, and digital processing cannot be performed even after sorting and sorting, and human input is required again.

  Accordingly, an object of the present invention is to solve the above-mentioned problems so that necessary information can be efficiently obtained from a database in which a large amount of information such as patent information is collected, and information classified by visible information is An information retrieval method that can be effectively utilized and reflected in retrieval work, and that does not generate waste of a visible information recording medium, and a recording medium used in the method.

In order to solve the above problems, in the present invention, a sheet-like visible information recording medium having a reversible thermosensitive recording layer capable of displaying and erasing a visible image is provided, and a non-contact IC is provided on the sheet-like visible information recording medium. Provide a composite recording medium with a tag attached,
(i) Displaying at least a part of the information retrieved by the computer from the database under arbitrary conditions on the visible information recording medium of the composite recording medium, and the identification information of the non-contact IC tag of the composite recording medium and the retrieved information Stored in the computer in association with
(ii) Next, a person reads the information displayed on the composite recording medium and selects the composite recording medium by arbitrary judgment,
(iii) The identification information of the non-contact IC tag of the selected composite recording medium is read and input to the computer, and the database of the selected information is reconstructed. The series of steps (i) and (ii) And an information search method comprising obtaining the searched information through one or more searches including (iii).

  In the information retrieval method of the present invention comprising the steps described above, information such as patent information retrieved from a database by a computer under arbitrary conditions is recorded as visible information on a sheet-like visible information recording medium having a thermosensitive recording layer ( At the same time, the identification code of the non-contact IC tag is read by a computer and stored in the computer in association with the retrieved information.

  Next, the person reads the information displayed on the composite recording medium to judge the value, and by selecting the composite recording medium, in addition to the mechanical search means, the human arbitrary judgment is added. Complex value judgments can be made, and as a result, highly reliable information based on human experience can be selected and collected.

  When the collected information is input to a computer by reading the identification code from the non-contact IC tag of the composite recording medium with a reading device, a secondary database in which only the selected patent information is selectively collected is regenerated. Constructed, this secondary database becomes higher value-added information selected by human empirical value judgment than the original database.

  In this way, by obtaining information that has undergone a series of search steps one or more times from the reconstructed database, it is possible for the searcher to efficiently and surely obtain information having higher utility value, and also a visible information recording medium The visible image can be displayed and erased, i.e. unnecessary information can be erased at any time, and only necessary information can be displayed and used any number of times. Therefore, the impact on resources and the environment is small, and a low-cost search can be performed.

  The information search method as described above is also an appropriate search method when searching patent information in which a large amount of information is stored in a CD or a host computer on the web.

  A sheet-like visible information recording medium provided with a heat-sensitive recording layer capable of displaying and erasing a visible image is provided as an information retrieval composite recording medium used in an information retrieval method for solving the above-mentioned problem, and this sheet-like visible information recording medium An information retrieval composite recording medium having a non-contact IC tag attached thereto can be employed.

  This can produce a transparent state and white turbid state or a colored state and a decolored state of the heat-sensitive recording layer depending on the temperature condition of the heat treatment, so that the visible information can be rewritten and erased. As the so-called rewritable layer, a known reversible thermosensitive recording material can be employed, for example, a transparent cloudy type or a leuco dye.

  The composite recording medium preferably employs a non-contact IC tag provided in a random arrangement on the edge of the sheet-like visible information recording medium. This is because if the non-contact IC tags are arranged in a stacked manner, malfunction or reading may not be surely performed.

  In addition, when the visible information recording medium that can be read from both sides of the sheet is employed as the sheet-like visible information recording medium, it is preferable because much visible information can be obtained from both sides of the sheet.

  According to the present invention, information is recorded on a visible information recording medium, the displayed information is read by a person, a composite recording medium with a non-contact IC tag is selected by arbitrary judgment, and a non-contact IC of the selected composite recording medium is selected. Since the tag is identified and stored in the computer and information is obtained from the reconstructed database, the necessary information can be efficiently obtained from the database in which a large amount of information such as patent information is collected. The information classified by the visible information can be effectively used to be reflected in the search operation, and there is an advantage that the visible information recording medium does not generate waste, and the recording medium used for the method is used.

  Embodiments of an information search method and a composite recording medium used in the method according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the embodiment of the information retrieval method is as follows: (i) The information retrieved from the database 1 by the computer 2 under arbitrary conditions is written by the writing device 5 attached to the visible information recording medium 4 of the composite recording medium 3. In addition to recording, the non-contact IC tag 6 is identified and stored by a reading device 7 attached to the computer,
(ii) Next, a person outside the figure reads the information displayed on the composite recording medium 3 and selects the composite recording medium by arbitrary judgment,
(iii) A step of causing the reader 7 to read the identification code from the non-contact IC tag 6 of the selected composite recording medium 3 and inputting it to the computer 2 to reconstruct the database of the selected information ( This is an information retrieval method comprising obtaining a database of information that has undergone a series of retrieval steps consisting of i), (ii), and (iii) one or more times, or obtaining a printed visible information recording medium 4.

  As shown in FIG. 2, the composite recording medium 3 includes a sheet-like visible information recording medium in which a reversible thermosensitive recording layer 8 capable of displaying and erasing a visible image is integrally laminated with a sheet-like substrate 9, an antenna 6a, The contactless IC tag 6 provided with the IC chip 6b is integrated.

  The configuration of the system used in the information search method will be described in more detail. For example, in the computer 2 that reads information from the external database 1 related to industrial property rights, the database control unit 10 installed as a program, search information There is a search operation control unit 11 that corrects and reconstructs the data, and a central control unit 12 that integrates and controls them. The interface includes an external display unit 13, an input device 14 such as a keyboard, and an IC tag reader (tag reader) 7 A recording medium writing device (IC tag writer) 5 is installed in combination, and these functions are linked with each other by a program (OS) of the central control unit 12.

  The database 1 may be data stored in a hard disk, a DVD-ROM, or the like, or may be read from an external database using a server. This includes public numbers, patents, utility model registrations, designs and trademarks. Contains information on industrial property rights such as the contents of applications or registrations.

  The database control unit 10 that reads information from the database 1 is a program that reads necessary information from the database. The patent information required from the search result is, for example, a publication number, an application number, an application date, and the like, and is sent to the search work control unit 11.

  The search operation control unit 11 that corrects or reconstructs the search information reads information of a non-contact IC tag (hereinafter, this may be referred to as Radio Frequency Identification: RFID recording medium in a broader sense). This is a part for rearranging and selecting patent information in the related database control unit 10 based on the information obtained at that time. By selecting only the non-contact IC tag (RFID recording medium) 6 from which useful information is obtained, it is possible to screen useful information from the database 1 and proceed to the next information search.

  The external display unit 13 uses a CRT display, LCD (liquid crystal display), or the like, and can display progress, search conditions, search results, and the like. Of course, printed patent information can also be displayed on the screen.

  The input device 14 is a device for manually inputting information necessary for search, such as search conditions, operation methods, and designation of patent information. These may be a keyboard or a touch panel.

  The IC tag reader 7 includes a reader necessary for reading the RFID, and this is selected in consideration of the communication distance, the reading accuracy, and the like. The reading device 7 has an automatic paper feeding device and can read the RFID at high speed. The condition that can be read is set according to the frequency used for communication and the antenna output, and the maximum number of sheets that can be read can be operated.

The apparatus for recording on the visible information recording medium 4 displays or erases an image by directly or indirectly applying heat to the reversible thermosensitive recording layer 8. When rewriting directly with heat, a thermal head, A heating means such as a heat stamp or a heater bar is used. When rewriting with light, a CO ₂ laser, a semiconductor laser, or the like is used.

  The control unit such as the central control unit 12 includes a CPU, a RAM, a ROM, a hard disk, and the like. Control of the reading device 7 and the writing device 5 by executing a program, organization of information by the input device 14, and reconstruction of information Can be performed.

  The composite recording medium 3 has a non-contact IC tag 6 attached to a sheet-like visible information recording medium 4, that is, a visible information portion and an RFID portion.

  The non-contact IC tag (RFID recording medium) 6 has an antenna 6a used for communication with the IC chip 6b, and a well-known product can be used. Specific examples include Mifare, I-code manufactured by Philips, or a muchip manufactured by Hitachi, Ltd.

  Only the ID number needs to be written in the non-contact IC tag (RFID recording medium) 6, and the CPU is not necessarily required. The size is not particularly limited, but it is needless to say that the smaller the size, the better the handleability.

  The antenna 6a is formed by etching a metal such as aluminum or copper, forming an antenna pattern by printing on a silk screen or the like using a conductive ink, or using a copper wire as a coil to form an antenna. It is created by the method.

  When the RFID is attached to the composite recording medium, it is preferably provided at the edge of the sheet-like visible information recording medium 4 so as not to overlap the visible display recording portion. In addition, when a plurality of non-contact IC tags (RFID recording media) 6 are stacked, it may cause a reading malfunction. Therefore, the composite recording media 3 may be arranged randomly even when provided on the edge. This is preferable in order to prevent the non-contact IC tags (RFID recording media) 6 from overlapping as much as possible.

  The reversible thermosensitive recording layer 8 capable of displaying and erasing a visible image on the visible information recording medium 4 is formed of a known reversible thermosensitive recording material.

  Specifically, by adjusting the heating temperature, it is possible to change the state of transparency and cloudiness to become visible (hereinafter referred to as “transparent cloudiness type”), or to adjust the heating temperature and the cooling rate after heating. Accordingly, it is possible to use a material that develops color and becomes visible (hereinafter referred to as “color tone change type”).

  The reversible thermosensitive recording material is made of a material capable of displaying and erasing a visible image by reversibly changing transparency or color development depending on temperature, and this material is made of a resin base material and a recording material.

  As the kind of resin base material used for the recording layer, a transparent and good synthetic resin is preferable. For example, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-maleic acid copolymer, Vinyl chloride-vinyl acetate-acrylic acid copolymer, vinyl chloride-vinyl acetate-vinyl alcohol copolymer, other vinyl acetate compounds, vinyl chloride copolymers, polyvinylidene chloride, vinylidene chloride copolymer, polyester resin, Examples thereof include transparent amorphous resins such as polyurethane resin, acrylic resin, polystyrene resin, ABS resin, and AS resin. These may be used alone or in combination of two or more. Furthermore, a crosslinkable resin can also be used.

  As a recording material of a type whose transparency changes, a material in which an organic low molecular weight compound is dispersed as an aggregate having a diameter of about 0.1 to 2.0 μm in a polymer resin matrix can be preferably used. . In this type of recording layer, the organic low molecular weight compound dispersed in the polymer resin matrix undergoes a volume change between crystallization and melting, and a void is generated between the polymer resin matrix. This utilizes the effect that light scattering occurs.

  Specific examples of the organic low molecular weight compound include known organic low molecular weight compounds such as higher fatty acids having 12 or more carbon atoms, higher fatty acid esters, carboxylic acids, dicarboxylic acids, ketones, ethers, alcohols, esters, sulfides, fatty acid amides, A crystalline low molecular weight compound composed of an aliphatic dibasic acid, an aliphatic dibasic acid ester and a derivative thereof may be used, and these may be used alone or in combination of two or more.

  Examples of fatty acid alkyl esters having 12 or more carbon atoms include methyl stearate, ethyl stearate, butyl stearate, octyl stearate, stearyl stearate, behenyl stearate, methyl behenate, ethyl behenate, butyl behenate. Octyl behenate, stearyl behenate, behenyl behenate, methyl lignocerate, ethyl lignocerate, and the like.

  Examples of the aliphatic dibasic acid having 10 or more carbon atoms include sebacic acid, dodecanedioic acid, tetradecanedioic acid, and eicosane diacid. The fatty acid alkyl ester having 12 or more carbon atoms and the aliphatic dibasic acid having 10 or more carbon atoms may be used alone or in combination of two or more.

  As an example of a recording material of a type that changes color developability, that is, a color tone, an electron donating color developing compound and an electron accepting compound are dissolved or dispersed in a polymer resin base material. An electron-accepting compound that exhibits acid properties or base properties by the action of heat can be a developer or a color reducing agent for an electron-donating color-forming compound having a reversible structure. It is something that uses that.

For example, after heating to a temperature equal to or higher than the melting temperature of the electron-donating color compound and electron-accepting compound, color develops when rapidly cooled, and after heating at a temperature equal to or lower than the melting temperature, the color disappears when gradually cooled. When an electron accepting compound having a long chain alkyl group is used as the developer, the developer itself has a cohesive force due to the structure of the long chain alkyl group. For this reason, depending on the heating conditions and the cooling rate after heating, the leuco dye can be contacted or separated, and when the developer and the leuco dye are brought into contact with each other, the color is developed and the color is erased by separation. .
Even when such a type of recording material that changes color tone is used, the same polymer resin base material used for the transparent cloudy type recording material can be used as the polymer resin base material.

  Specific examples of electron donating color-forming compounds (so-called leuco dyes) having a lactone ring in the molecular structure and exhibiting color development due to structural changes such as ring opening of the lactone ring by electron emission include crystal violet lactone, 3- ( 4-diethylamino-2-ethoxyphenyl) -3- (1-ethyl-2-methylindol-3-yl) -4-azaphthalide, 3,3-bis (1-ethyl-2-methylindol-3-yl) phthalide, etc. Phthalide compounds, 3-diethylamino-6-methyl-7-anilinofluorane, 2- (2-chloroanilino) -6-diethylaminofluorane, 2- (2-chloroanilino) -6-dibutylaminofluorane, 2- Anilino-3-methyl-6 (N-ethylisopentylamino) fluorane, 3-cyclohexylmethylamino-6 Methyl-7-anilinofluorane, 3-benzylethylamino-6-methyl-7-anilinofluorane, 3-diethylamino-6-chloro-7-anilinofluorane, 3-methylpropylamino-6-methyl And fluorane compounds such as -7-anilinofluorane and 3-diethylamino-6-methyl-7-xylidinofluorane.

  As an electron-accepting compound, for example, an organic phosphoric acid compound, aliphatic carboxylic acid compound or phenolic compound having an aliphatic group having 6 or more carbon atoms (a phenolic compound having an aliphatic group having 12 or more carbon atoms is preferred). Is mentioned.

  Specific examples of the electron-accepting compound include dodecylphosphonic acid, tetradecylphosphonic acid, hexadecylphosphonic acid, octadecylphosphonic acid, eicosylphosphonic acid, α-hydroxydecanoic acid, α-hydroxytetradecanoic acid, and α-hydroxyhexadecane. Examples include acid, α-hydroxypentadecanoic acid, α-hydroxyeicosanoic acid, α-hydroxydocosanoic acid, α-hydroxytetracosanoic acid, α-hydroxyhexacosanoic acid, α-hydroxyoctacosanoic acid, and the like.

  Examples of phenolic compounds include 4'-hydroxy-4-octadecylbenzanilide, N-octadecyl-4-hydroxybenzamide, N- (4-hydroxyphenyl) -N'-octadecylurea, 4-hydroxyphenylpropiono- And behenyl hydrazide.

  The blending ratio of the electron donating color compound, the electron accepting compound and the polymer resin base material is, for example, preferably 10 to 100 parts by weight, more preferably 20 to 50 parts by weight of the electron accepting compound with respect to 10 parts by weight of the leuco dye. The polymer resin base material is preferably 10 to 200 parts by mass, and more preferably 20 to 100 parts by mass with respect to 10 parts by mass of the leuco dye.

  The reversible thermosensitive recording layer is obtained by dispersing an organic low molecular weight compound in a polymer resin matrix and then applying it on a support or the like, or an electron donating coloring compound in the polymer resin matrix. After the electron-accepting compound is dissolved or dispersed, it is formed by coating on a support or the like.

  The thickness of the reversible thermosensitive recording layer is preferably 3 μm to 30 μm, but is not particularly limited to this range. If two or more reversible thermosensitive recording layers are provided on a sheet-like visible information recording medium, a visible information recording medium that can be read from both sides of the sheet can be formed. That is, visible information can be read from both sides of the composite recording medium.

  In the case of the transparent cloudy type, it is preferable to further provide a light reflection layer in order to increase the contrast of the visible image and improve the sharpness.

  The material of the sheet used for the base material of the composite recording medium used in the present invention is preferably a material having an appropriate strength in terms of handleability when reading patent information and durability when repeatedly used. Examples thereof include paper such as Kent paper and coated paper, synthetic paper, polyethylene terephthalate, polyethylene, polypropylene, PETG, polycarbonate, polybutylene terephthalate, polylactic acid, and polyvinyl chloride.

  In order to fix the RFID to the base material of such a sheet-like visible information recording medium, the seal-like RFID may be attached to the peripheral portion with an adhesive or fixed so that the RFID portion is sandwiched between the base materials. May be.

[Production of sheet-like visible information recording medium]
A dispersion for a reversible thermosensitive recording layer having the composition shown below was dispersed using a paint shaker for 2 hours. Thereafter, 5 parts by mass of an isocyanate compound (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name: Coronate L, solid content: 75% by mass) is added as a curing agent, and the mixture is sufficiently stirred to prepare a coating solution for a reversible thermosensitive recording layer. did.

  This coating solution was applied onto 100 μm thick white PET (Diafoil W400 manufactured by Mitsubishi Chemical Polyester) and dried at 100 ° C. for 5 minutes to prepare a reversible thermosensitive recording layer having a thickness after drying of 7 μm.

(Dispersion for reversible thermosensitive recording layer)
Dye precursor (3-diethylamino-6-methyl-7-anilinofluorane) 10 parts by mass Electron-accepting compound (hydroxyphenylpropiono-behenyl hydrazide) 20 parts by mass Polymer resin matrix (manufactured by Mitsubishi Rayon Co., Ltd., product) Name: LR-1503) 50 parts by mass Solvent (toluene) 150 parts by mass

  On the formed reversible thermosensitive recording layer, an ultraviolet curable resin is applied so that the thickness after drying becomes 2 μm, and then cured by irradiation with ultraviolet rays under the condition of 120 W / cm × 10 m / min. Formed.

As a support, an antenna coil was obtained by winding a thin copper wire in a loop shape on 38 μm PET (Diafoil, manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.) and fixing it with an adhesive. An IC chip (I-CODE SLI, manufactured by Philips) is fixed on the antenna portion with a conductive adhesive to form the RFID portion of the present invention, and this RFID portion is bonded to the outer peripheral portion of the recording medium using an adhesive seal. .
In this process, the place where the RFID part is installed is changed as needed, and 1000 composite recording media are manufactured. The composite recording medium has a unique ID number in the IC chip one by one.

  Next, as a patent information database, claims, texts, drawings, etc. of patent gazettes are stored, and a database was created based on CD-ROM data issued by the JPO that can be searched by keywords.

  The keyword and the search conditional expression are “Internet” and “search” and “screen”. When the claims are searched by text search, about 700 patent gazettes are selected.

  The produced composite recording medium was set in a recording device, and the patent information in the database 1 such as the publication number, applicant, abstract, and claims was printed as an abstract while reading the ID one by one while reading the ID. . The printed record was a clear record in black letters, and the read ID number was associated with the information in each database 1.

  While looking at the printed visible information, a person manually searched for the desired patent publication. Here, from the viewpoint of R & D technical similarity, those with high similarity were classified as (A), and those with no similarities were classified as (B).

  Then, only the patent information (A) having a high technical similarity was applied to the reading device, the ID number was read, and the central control unit performed arithmetic processing. As a result, the database 2 consisting only of patent information (A) with high technical similarity was created, and it was possible to narrow down to about 200 cases.

  Next, in order to confirm the patent contents in more detail, a new ID number is read using the composite recording medium on which the abstracts of the patent information (A) and (B) used in the above classification are printed. The entire patent text with only the patent information (A) was printed by overwriting on the writing device. That is, the original abstracts of the patent information (A) and (B) were deleted, and the entire patent text of the patent information (A) was newly printed. At that time, since the entire patent text was printed on a plurality of pages, a plurality of ID numbers were assigned to one patent information here.

  For patents that could not be printed at once because of the large number of printed sheets, the reader was repeatedly read the necessary amount while reading the gazette.

In this way, the recording medium once used can be read again, and the visible recording information can be rewritten, so that it can be reused.
Eventually, the target patents could be narrowed down to about 30 and this was used as database 3. These were highly technically similar that were obtained through a secondary search, and could be collected as useful information for reviewing research and development. In addition, as described above, it is not necessary to discard the printed matter, and it has become possible to search for patents in a short time.

[Comparative example]
The search operation of the example was printed using normal paper. Since there is no RDIF, it was necessary to manually input data to create a database, and it took a very long time, and a huge amount of paper became waste.

Explanatory drawing of the system used for the information retrieval method of the embodiment Sectional view of the composite recording medium of the embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Database 2 Computer 3 Composite recording medium 4 Visible information recording medium 5 Writing apparatus 6 Non-contact IC tag 6a Antenna 6b IC chip 7 Reading apparatus 8 Reversible thermosensitive recording layer 9 Base material 10 Database control part 11 Search work control part 12 Center Control unit 13 External display unit 14 Input device

Claims (5)

A sheet-like visible information recording medium provided with a reversible thermosensitive recording layer capable of displaying and erasing a visible image, and a composite recording medium provided with a non-contact IC tag attached to the sheet-like visible information recording medium,
(i) Displaying at least a part of the information retrieved by the computer from the database under arbitrary conditions on the visible information recording medium of the composite recording medium, and the identification information of the non-contact IC tag of the composite recording medium and the retrieved information Stored in the computer in association with
(ii) Next, a person reads the information displayed on the composite recording medium and selects the composite recording medium by arbitrary judgment,
(iii) The identification information of the non-contact IC tag of the selected composite recording medium is read and input to the computer, and the database of the selected information is reconstructed. The series of steps (i) and (ii) And an information search method comprising obtaining the searched information through one or more searches consisting of (iii).   The information search method according to claim 1, wherein the information is information on an industrial property right selected from a patent, a utility model, a design, or a trademark.   An information retrieval composite recording medium comprising a sheet-like visible information recording medium having a reversible thermosensitive recording layer capable of displaying and erasing a visible image, and a non-contact IC tag attached to the sheet-like visible information recording medium.   The composite recording medium for information retrieval according to claim 3, wherein the composite recording medium is provided with a non-contact IC tag in a random arrangement at an edge of the sheet-like visible information recording medium.   5. The information retrieval composite recording medium according to claim 3, wherein the sheet-like visible information recording medium is a visible information recording medium readable from both sides of the sheet.

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