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Publication numberUS3636318 A
Publication typeGrant
Publication dateJan 18, 1972
Filing dateJun 24, 1969
Priority dateJun 24, 1968
Also published asDE1931536A1, DE1931536B2, DE1931536C3
Publication numberUS 3636318 A, US 3636318A, US-A-3636318, US3636318 A, US3636318A
InventorsGunnar Lindstrom, Gunde Schullstrom
Original AssigneeSaab Ab
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Verifiable identification document
US 3636318 A
Images(4)
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Description  (OCR text may contain errors)

United States Patent Lindstrom et al.

[54] VERIFIABLE IDENTIFICATION DOCUMENT [72] lnventors'. Gunnar Lindstrom; Gunde Schullstrom,

both of Linkoping, Sweden [73] Assignee: Saab Aktiebolag, Linkoping, Sweden [22] Filed: June 24, 1969 [21] Appl. No.: 836,000

[30] Foreign Application Priority Data June 24, 1968 Sweden ..8489/68 [52] US. Cl. ..235/6l.12 M, 340/149 A [51] Int. Cl. ..G06k 7/08 [58] Field of Search .23S/6l.l2, 61.1 14; 283/7, 8;

[56] References Cited UNITED STATES PATENTS 2,254,931 9/1941 Bryce ..235/6l.l2 M

[451 Jan. 18,1972

2,914,746 11/1959 James ..340/l49A OTHER PUBLICATIONS Parry, F. C., identification Card," IBM Technical Disclosure Bulletin, Vol. 3, No. 6, Nov. 1960, p. 8.

Primary Examiner-Maynard R. Wilbur Assistant Examiner-William W. Cochran Att0rneylra Milton Jones [5 7] ABSTRACT A document used to assert a personal right has a randomized unique pattern of normally invisible but mechanically detectable material (e.g., finely divided ferromagnetic material) in a zone overlapping any visible indicia identifying the owner. The document is presented to a mechanical reader which 1 scans the pattern along predetermined lines and records resultant output signals, along with an identifying record. Upon subsequent presentation, it is similarly scanned, for comparison with the recording to confirm its authenticity. Methods of producing appropriate patterns are disclosed.

4 Claims, 12 Drawing Figures PATENTED JAN 8 m2 3.636.318

SHEET 3 [IF 4 INVENTORS Gunner LmdsZr/a'm nude 5': uZZsird-j'm VERIFIABLE IDENTIFICATION DOCUMENT This invention relates to personal identification documents, such as drivers licenses and credit cards, thatare used by an individual to assert or confirm a personal right that he possesses; and the invention relates more particularly to a method of verifying an individual's entitlement to a personal right, an identification document that embodies means for verifying its authenticity, and the method of manufacturing such a document and verifying its authenticity.

Such documents as drivers licenses, credit cards, bank account cards and passes of various kinds are much relied upon to confirm an individuals entitlement to a personal right that he has established. I 1

However, the use of such documents always poses certain problems. In the first place, the document must identifythe person to whom it properly belongs, so that it cannot be used by someone else who has acquired it without authorization. As a rule, therefore, such documents carry one or more readily visible items of personal identification such as a photograph of the owner, his signature, a description of him in tenns of age, sex, height, coloration and the like, or one or more of his fingerprints. But even the presence of identification data on a document has heretofore afforded no real assurance that the person presenting it was the one authorized to use it, for such documents lent themselves more or less readily to forgery or alteration.

With these considerations in mind, it is a-general object of the present invention to provide means for verifying the identity of an individual asserting a personal right, and for verifying his entitlement to that right, and more particularly to provide a document of the character described which contains invisible means for verifying its authenticity and which is therefore exceedingly difficult to forge or alter.

Another object of this invention is to provide a simple and inexpensive document of the character described that is readily verifiable as to authenticity.

It is also an object of this invention to provide a document of the character described which embodies invisible verification means of a type which can be readily recorded but is extremely difficult to duplicate, and which will be disturbed by any attempt at alteration of the document so that the spurious character of the document can be readily detected after any such attempt.

A further object of this invention is to provide means for obtaining verification of a document of the character described with both great rapidity and great accuracy, and without the need for reliance upon a human agents evaluation of the authenticity of the document.

With these observations and objects in mind, the manner in which the invention achieves its purpose will. be appreciated from the following description and the accompanying drawings. This disclosure is intended merely to exemplify the invention. The invention is not limited to the particular structure disclosed, and changes can be made therein which lie within the scope of the appended claims without departing from the invention.

The drawings illustrates several complete examples of physical embodiments of the invention constructed according to the best modes so far devised for the practical application of the principles thereof, and in which:

FIG. 1 illustrates the visible features of a document embodying the principles of this invention;

FIG. 2 is an enlarged view of a portion of the document shown in FIG. 1, showing the normally invisible random pattern of finely divided mechanically detectable material that characterizes the document of this invention;

FIG. 3 is a longitudinal sectional view through the document shown in FIG. 1, with thickness greatly exaggerated;

FIG. 4 is a three-dimensional graph representing output .signals obtained from a mechanical reading device scanning across the patten of FIG. 2 along the lines a--a and b-b;

FIG. 5 is a more or less diagrammatic perspective view of reading and recording apparatus that s used in verifying the genuineness of a document such as that shown in FIG. 2;

FIG. 6 is a vertical sectional view through the scanning head of the reader shown in FIG. 5;

FIG. 7 is a sectional view taken on the plane of the line 7-7 in FIG. 6;

FIG. 8 is a view generally similar to FIG. 2 but illustrating a modified form of pattern of mechanically detectable material;

FIG. 9 illustrates another modified form of pattern of mechanically detectable material;

FIG. 10 is a cross-sectional view, greatly exaggerated in thickness, of the document shown in FIG. 9;

FIG. 11 is a three dimensional graph representing output signals obtained from a mechanical reading device moved across the pattern of FIG. 9 along the lines cc and d-.-d; and

FIG. 12 depicts another modified form of pattern of mechanically detectable material incorporated in a document embodying the principles of this invention.

' Referring now the the accompanying drawings, the numeral 5 designates generally a'document such as a'drivers license which an individual carries on his person and presents whenever he has occasion to confirm or assert a right personal to him. The document 5 illustrated in FIG. 1 contains certain visible data that identify its rightful possessor, such as his photograph 6 and his signature 7, and it contains other visible data appropriate to its nature and purpose, such as a magnetically readable registration number 8.

A document having identifying indicia such as a photograph tends to confirm the identity of the person presenting it but does not confirm its own authenticity, since the document may be a forgery or may have been altered, as by replacing the photograph of its original owner with that of a person who has come into unauthorized possession of it. Therefore, to provide for confirmation that it is genuine, the document of the present invention has incorporated in it a finely divided material which is normally invisible but which is mechanically detectable (e.g., ferromagnetic material), arranged in a distinctive pattern across a zone of the document that includes its personal identification data.

The document illustrated in FIGS. I3 comprises a thin but relatively stifi base 9 of cardboard, sheet plastic or the like, to which is secured the photograph 6, which can be an ordinary print on paper-base material. Before the photograph is bonded to the base 9, there is applied to the predetermined area of the base that will include at least a substantial portion of the photograph a random scattering or distribution of finely divided ferromagnetic material II, which can be made to adhere to the base by first covering the front surface of the base with a thin coating of a bonding agent. If the photograph is removed from the base and replaced with another, that portion of the pattern defining material that was beneath the original photograph will be removed at least in part, thus altering the pattern so that the spurious character of the document will appear when it is presented for verification, as explained hereinafter.

As an alternative tocoating the pattern over the base and beneath the photograph, the pattern can be formed on a thin, transparent cover film 12 that is bonded flatwise across the front face of the base and over the photograph. Because the finely divided ferromagnetic material on the cover film 12 comprises only a thin, invisible layer, it does not interfere with examination of the photograph. Any attempt to remove the photograph with require that the film 12 be first removed, thus destroying or altering the pattern.

It will be apparent that the pattern of ferromagnetic material could be a composite one, provided by a coating on the front surface of the base, extending beneath the photograph, and another on a cover film overlying the base and the photograph.

Since the finely divided material that defines the pattern is randomly distributed, the pattern on each document will be unique in that it will differ from the patterns on all other documents issued by the same authority; for it will become apparent as the description proceeds that an almost infinite variety of patterns is available.

When the document has been prepared, the ferromagnetic material is magnetized in a reader I4 to which the document is presented and which comprises a magnetic reading head 15 and means for taking readings at predetermined stepwise intervals along parallel scan lines extending in one or more directions across the surface of the document. The reader detects different magnetic intensities in different parts of the pattern, in accordance with the density and distribution of the ferromagnetic material in the pattern, and it produces electrical output signals corresponding to these different magnetic densities, which output signals are transferred to a recorder 16 that can comprise the memory bank of a data processing computer 17. In the memory bank the output signals produce a record which is a coded representation of the pattern and which is readily accessible for future reference.

Into the memory bank or other record storage means there is also fed other information relating to the owner of the document, such as a registration number or the owner's name. For this purpose the magnetically readable registration number 8 on the document 5 is outside the zone of the pattern, so that it can be automatically read substantially simultaneously with scanning of the pattern, without interference from the ferromagnetic material defining the pattern, and can be recorded in association with the pattern record.

After recording, the document is demagnetized and is delivered to the person for whom it was prepared. When he subsequently presents the document to assert the right that it establishes, his identity will be confirmed by the photograph and other identification material on it, and the authenticity of the document can be verified by presenting it to a reader similar to the reader 14, connected with the memory bank 16 or otherwise associated with the record or a copy of the record to enable the pattern on the document to be compared with the record of it.

The reading head I5 of the reader 14 can comprise a bank of head elements arranged in groups of three, each group comprising (as illustrated in FIG. 6) a magnetizing head 19, a detecting head 20 and an erasing head 21; and the groups can be arranged in a row (as illustrated in FIG. 7) for taking readings along predetermined lines across the document. As shown in FIG. 5, the reading head is carried on an arm 24 that is mounted the swing in an arc across the document, about the axis 25. As the arm swings, it carries the groups of heads across the surface of the document in concentric arcs, with any point on one of said arms being successively passes over by a magnetizing head, a detecting head and an erasing head.

The output signals from the several detecting heads are fed into the memory bank 16 through an amplifier 23.

In the event that a document embodying the principles of this invention is lost, the owner can promptly notify the issuing authority. The recording corresponding to it can then be immediately erased or destroyed, and a new and different document and record can be readily produced.

Certain types of documents preferably carry no identification of the person authorized to use them, as for example a bank account card that could be misused if it became lost and were found by an unscrupulous person who might use it if he knew the identity of its rightful owner. A document of that type, which is represented by FIGS. 9 and 12, can advantageously embody the principles of this invention, but the visible data on it would be such as would merely signify its nature or purpose for the owners convenience, without disclosing his identity. The significant information on such a document would be that contained in a unique pattern of mechanically detectable but invisible material, in accordance with this invention.

In presenting such a document, its owner would not have to show it to any agent of the bank or other issuing authority, since the visible indicia on it would not be especially significant, but, instead, he would present it to a detecting device like the reader 14, and would establish his identity as the person entitled to use it by supplying to the reading machine or an associated device a coded symbol (name, word or number) known only to him and recorded along with the pattern record. The proper association of the pattern output from the reading device with the coded symbol supplied by the document holder would thus confirm both his identity and the authenticity of the document.

FIG. 4 represents the output signals that would issue from a reader as it scanned the pattern shown in FIG. 2 along the lines 11-11 and bb. For accurate reading of such a diffuse pattern, which produces relatively small and gradual variations in the output signal, the reader and recorder must both be of good quality. Furthermore, the recorded codification of the pattern must be of such character that deviations within certain prescribed tolerance limits will be accepted, in order to allow for tolerance and deviations in the various reading devices to which the document may he presented from time to time. The amplifier 23 for each reading device can be adjusted to compensate to some extent for individual differences in the reader.

However, various expedients can be employed to produce a pattern having more sharply defined contrasts, so that the reading device is not called upon to discriminate closely and can therefore have larger tolerances. For example, the pattern can be interrupted by well-defined lines of discontinuity 27, as illustrated in FIG. 8. These lines can be formed by scoring or scraping the coatings of ferromagnetic material and binder on the base 5 or cover film 12, or by scattering the ferromagnetic film onto the coating of binder through a screen of appropriate mesh that closely overlies the binder. With this type of pattern the output signal from the reader will have sharp, stepwise changes whenever a line is crossed in the course of scanning, thus affording a recording that has well defined characteristics corresponding to the lines and varying values for the areas of material between the lines.

A pattern which lends itself to very definite discrimination is illustrated in FIG. 9 and consists of more or less jagged lines of ferromagnetic material. Preferably such a pattern is formed on each of two pattern carriers 27 that are flatwise fastened together with their lines extending generally transversely to one another.

One of the pattern carriers 27 can comprise the base 9 and the other can be a cover film l2 overlying the base. However, the preferred method of forming such a pattern is to apply a coating of crackle lacquer or the like to a very thin sheet of aluminum of an aluminum alloy having a nonuniform grain structure, and then tension the sheet in one direction to cause cracks to develop in the lacquer, which cracks extend generally parallel to one another but are irregular and nonuniform and thus define a unique random pattern. The finely divided ferromagnetic material, mixed in a fluid binding agent, is applied to the lacquered surface, and a magnet is placed below the sheet to draw the material down into the cracks. The excess material is then wiped off the sheet and the binder is allowed to harden, after which a pair of card-size pattern carriers are cut from the sheet and bonded together with their lines transverse to one another to form a card which can be embedded in plastic.

In the document made by the method just described, wherein the magnetic material occupies only the cracks near the surface of each pattern carrier, the jagged lines of magnetic material are at two different levels, and therefore the finished document produces output signals at three different levels, as indicated by FIG. 11, which depicts and signals produced in scanning along the lines c-c and d-d in FIG. 9. The lowest signal level A, will occur in the zones where neither of the pattern carriers directly beneath a reading head has a crack; intermediate level signals A will occur when there is only one thickness of ferromagnetic material beneath the head; and signals of a high level A will be produced where lines of ferromagnetic material cross one another beneath the head to afiord a double thickness of material.

In the embodiment of the invention illustrated in FIG. 12, a unique pattern has been produced by feeding a sheet of pattern carrier material, having a more or less uniform coating of ferromagnetic material mixed in a binder, beneath a group of spaced-apart styli that are individually and randomly actuated by a data processing computer, to produce a pattern of parallel scratches 28 that are interrupted at irregular random intervals. As with the FIG. 9 embodiment of the invention, individual pattern carriers can be cut from the sheet thus processed, superimposed upon one another, and embedded in plastic to form documents.

It will be appreciated that finely divided ferromagnetic material is only one example of an invisible but mechanically detectable material suitable for employment in connection with the present invention. It is possible to use, instead, materials having electrical resistance or capacitance characteristics, or a fluorescent or other photoresponsive material; and in such cases the reader will of course be adapted to respond to the particular type of material used.

From the foregoing description taken with the accompanying drawings it will be apparent that this invention provides a method of identifying an individual and confirming his entitlement to a personal right, a readily verified personal document for confirming an individuals entitlement to a personal right, and a simple and inexpensive method of manufacturing such a document.

What is claimed as our invention is:

l. A document of the type intended to be carried by an individual and presented to verify or assert a right personal to him, said document being characterized by:

finely divided ferromagnetic material in a scattered random pattern of nonuniform density concealed in a predetermined zone of the document, so that after the ferromagnetic material is magnetized by subjecting it to a magnetic field which is of uniform intensity in all portions of said zone, motion of a magnetic detector relative to the document across said zone will produce a variable but repeatable output which, when recorded, comprises a coded representation of the pattern to which subsequent reference can be made for verifying authenticity of the document.

2. A document of the type intended to be carried by an individual and presented to verify or assert a right personal to him, said document being of the type having finely divided magnetized ferromagnetic material concealed in a predetermined zone thereof that presents a distinctive pattern of magnetization to mechanical detector means by which the document can be verified, said document being characterized by:

the ferromagnetic material being distributed in said zone in a scattered random pattern of nonuniformly varying densities of such material.

3. The document of claim 2, further characterized by:

the ferromagnetic material being sandwiched between layers of other material that define the surfaces of the document, so that the presence of the ferromagnetic material is normally concealed by such other material, and so that any attempt at alteration of the pattern of distribution of the ferromagnetic material requires defacement of the document.

4. The document of claim 2, further characterized by:

visible indicia identifying the authorized possessor of the document in a zone overlapping said predetermined zone.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3755730 *Jul 26, 1971Aug 28, 1973Minnesota Mining & MfgA steel object having hidden magnetically readable identification and the method for applying the identification
US4114032 *Jan 9, 1976Sep 12, 1978Dasy Inter S.A.Documents having fibers which are coated with a magnetic or magnetizable material embedded therein and an apparatus for checking the authenticity of the documents
US4181251 *Oct 30, 1978Jan 1, 1980G.A.O. Gesellschaft Fur Automation Und Organisation MbhRecord carrier with safety features capable of being checked mechanically and method of checking said safety
US4218674 *Apr 20, 1978Aug 19, 1980Dasy Inter S.A.Method and a system for verifying authenticity safe against forgery
US4546242 *Oct 5, 1981Oct 8, 1985Stockburger HMethod for protecting against the re-transfer of uniquely recorded information on a data carrier and apparatus for recording and/or reading re-transfer-protected information
US4626669 *Dec 28, 1983Dec 2, 1986Fairview PartnersIntercept system for intercepting stolen, lost and fraudulent cards
US4649265 *Mar 4, 1985Mar 10, 1987Copytex Gmbh SicherheitssystemeMethod for protection against the re-transfer of uniquely recorded information on a data carrier and apparatus for recording and/or reading re-transfer-protected information
US4745267 *Dec 26, 1984May 17, 1988Fairview PartnersFraudulent card intercept system
US4806740 *Sep 19, 1986Feb 21, 1989Light Signatures, Inc.Magnetic characteristic identification system
US4816657 *Feb 7, 1984Mar 28, 1989Stockburger HMethod and device for characterizing and identifying falsification-proof data supports
US4837426 *Jan 16, 1987Jun 6, 1989Rand, Mcnally & CompanyObject verification apparatus and method
US4906988 *Jan 26, 1988Mar 6, 1990Rand Mcnally & Co.Object verification system and method
US4926031 *Apr 27, 1987May 15, 1990Gao Gesellschaft Fur Automation Und Organisation MbhSecurity document
US4982073 *Mar 5, 1989Jan 1, 1991Gao Gesellschaft Fur Automation Und Organisation MbhToken such as a credit or identification card and an apparatus for testing the token or card
US4985614 *Jun 5, 1989Jan 15, 1991Rand Mcnally & CompanyObject verification apparatus and method
US5177344 *Oct 5, 1990Jan 5, 1993Rand Mcnally & CompanyMethod and appparatus for enhancing a randomly varying security characteristic
US5216229 *Dec 7, 1990Jun 1, 1993Rand Mcnally & CompanyVerifiable object having incremental key
US5218528 *Nov 6, 1990Jun 8, 1993Advanced Technological Systems, Inc.Automated voting system
US5354097 *Jun 14, 1991Oct 11, 1994Teunis TelSecurity of objects or documents
US5521831 *Apr 11, 1994May 28, 1996Doyle Argosy Innovators Ltd.Method and system for the detection of counterfeit credit or debit cards and other counterfeit objects
US5719939 *Aug 15, 1994Feb 17, 1998Unicate B.V.System and method of verifying the legitimacy of a product against forgery
US6148091 *Sep 5, 1997Nov 14, 2000The Identiscan Company, LlcApparatus for controlling the rental and sale of age-controlled merchandise and for controlling access to age-controlled services
US6523741Feb 11, 2000Feb 25, 2003Dimaria Peter C.Apparatus for controlling the rental and sale of age-controlled merchandise and for controlling access to age-controlled services
US6565002 *Jul 21, 2000May 20, 2003Unicate B.V.Method and system for identifying one or more objects
US6920437Feb 15, 2002Jul 19, 2005Intelli-Check, Inc.Authentication system for identification documents
US7353994Dec 19, 2001Apr 8, 2008Andrew John FarrallSecurity, identification and verification systems
US7617986Jan 10, 2007Nov 17, 2009Datacard CorporationLaminate security feature
US7680306Apr 6, 2005Mar 16, 2010Signoptic TechnologiesMethod for recognition and tracking of fibrous media and applications of such a method, particularly in the computer field
US7687271Apr 22, 2004Mar 30, 2010Kodak Graphic Communications Canada CompanyCovert authentication method and apparatus
US7792522Jan 16, 2007Sep 7, 2010Positive Access CorporationSoftware key control for mobile devices
US7835563Dec 19, 2002Nov 16, 2010Actilor GmbhMethod of guaranteeing the authenticity of documents by checking for the presence of a changed feature, and the document
US7899751Jan 12, 2009Mar 1, 2011Intelli-Check, Inc.Parsing an identification document in accordance with a jurisdictional format
US8086867May 1, 2002Dec 27, 2011Northrop Grumman Systems CorporationSecure identity and privilege system
US8121386Sep 15, 2006Feb 21, 2012ArjowigginsSecure article, notably a security and/or valuable document
US8186573Apr 18, 2008May 29, 2012Sicpa Holding SaMethod of marking a document or item; method and device for identifying the marked document or item; use of circular polarizing particles
US8532640Jul 28, 2010Sep 10, 2013Positive Access CorporationSoftware key control for mobile devices
US8566244Mar 1, 2011Oct 22, 2013Intellicheck Mobilisa, Inc.Parsing an identification document in accordance with a jurisdictional format
US8672218Apr 27, 2012Mar 18, 2014Sicpa Holding SaMethod of marking a document or item; method and device for identifyng the marked document or item; use of circular polarizing particles
USRE35599 *Jan 4, 1995Sep 2, 1997Docusystems, Inc.Method and apparatus for enhancing a randomly varying security characteristic
DE102009021412A1 *May 14, 2009Nov 18, 2010Beb Industrie-Elektronik AgMethod for backtracking of documents, particularly of value documents and falsification of value documents, involves detecting data of document by physical measurement techniques
EP0155982A1 *Jun 19, 1981Oct 2, 1985Light Signatures, Inc.Authenticator device
EP0260940A2 *Sep 16, 1987Mar 23, 1988Light Signatures, Inc.Authenticity-verification and identification of documents or other objects
EP0275117A2 *Jan 15, 1988Jul 20, 1988Rand McNally & CompanyVerifiable object
EP0276814A2 *Jan 26, 1988Aug 3, 1988Rand McNally & CompanyObject verification system and method
EP0570162A2 *May 7, 1993Nov 18, 1993Canon Kabushiki KaishaRecord document authentication by microscopic grain structure and method
EP2016447A1 *May 11, 2006Jan 21, 2009Singular ID Pte LtdIdentification tags, objects adapted to be identified, and related methods, devices and systems
EP2637145A1Apr 18, 2008Sep 11, 2013Sicpa Holding SaMethod of marking and identifying a document or item having circular polarizing particles
WO1982000062A1 *Jun 19, 1981Jan 7, 1982Light Signatures IncNon-counterfeitable document system
WO1995027956A1 *Apr 11, 1995Oct 19, 1995Doyle Argosy Innovators LtdMethod and system for authenticating objects
WO1997011442A1 *Sep 18, 1996Mar 27, 1997Schlumberger Ind SaMethod for determining an encryption key associated with an integrated circuit
Classifications
U.S. Classification235/488, 340/5.53, 235/493
International ClassificationG07F7/10, G06K19/10, G07F7/08, B42D15/10, G07C9/00
Cooperative ClassificationG06K19/10, B42D2033/04, G07F7/10, B42D2033/16, B42D2035/34, B42D2035/06, G07F7/086, G07F7/1066, B42D15/10, B42D2033/24, B42D2035/02, B42D2033/32, G07C9/00039, B42D2035/10, B42D2035/08, B42D2031/28
European ClassificationG07F7/10P6B, G06K19/10, G07F7/08B, B42D15/10, G07C9/00B6B, G07F7/10