US3675948A - Printing method and article for hiding halftone images - Google Patents
Printing method and article for hiding halftone images Download PDFInfo
- Publication number
- US3675948A US3675948A US856663A US85666369A US3675948A US 3675948 A US3675948 A US 3675948A US 856663 A US856663 A US 856663A US 85666369 A US85666369 A US 85666369A US 3675948 A US3675948 A US 3675948A
- Authority
- US
- United States
- Prior art keywords
- halftone
- image
- printed
- halftones
- overall
- 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.)
- Expired - Lifetime
Links
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/342—Moiré effects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/405—Marking
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/08—Photoprinting; Processes and means for preventing photoprinting
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00838—Preventing unauthorised reproduction
- H04N1/00883—Auto-copy-preventive originals, i.e. originals that are designed not to allow faithful reproduction
-
- B42D2033/04—
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- B42D2033/06—
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- B42D2033/20—
-
- B42D2033/22—
-
- B42D2035/02—
-
- B42D2035/14—
-
- B42D2035/26—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/475—Cutting cards
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S283/00—Printed matter
- Y10S283/901—Concealed data
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S283/00—Printed matter
- Y10S283/902—Anti-photocopy
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Printing Methods (AREA)
Abstract
Description
Claims (13)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US856663A US3675948A (en) | 1969-09-10 | 1969-09-10 | Printing method and article for hiding halftone images |
US00167058A US3784289A (en) | 1969-09-10 | 1971-07-26 | Method and apparatus for hiding and viewing halftone images |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US856663A US3675948A (en) | 1969-09-10 | 1969-09-10 | Printing method and article for hiding halftone images |
Publications (1)
Publication Number | Publication Date |
---|---|
US3675948A true US3675948A (en) | 1972-07-11 |
Family
ID=25324205
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US856663A Expired - Lifetime US3675948A (en) | 1969-09-10 | 1969-09-10 | Printing method and article for hiding halftone images |
US00167058A Expired - Lifetime US3784289A (en) | 1969-09-10 | 1971-07-26 | Method and apparatus for hiding and viewing halftone images |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00167058A Expired - Lifetime US3784289A (en) | 1969-09-10 | 1971-07-26 | Method and apparatus for hiding and viewing halftone images |
Country Status (1)
Country | Link |
---|---|
US (2) | US3675948A (en) |
Cited By (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3961956A (en) * | 1972-09-26 | 1976-06-08 | Fuji Photo Film Co., Ltd. | Method for production of and distinction between combined validification and identification photographs |
US4039066A (en) * | 1974-02-07 | 1977-08-02 | Sweda International, Inc. | Forgery-resistant impact printing with matrix printer |
US4040353A (en) * | 1974-10-31 | 1977-08-09 | Opi Metriservice, Societe Anonyme | Process for coloring surfaces |
US4143967A (en) * | 1976-07-30 | 1979-03-13 | Benjamin J. Haggquist | Latent photo system |
US4168088A (en) * | 1977-12-15 | 1979-09-18 | Burroughs Corporation | Protected document and method of making the same |
US4175776A (en) * | 1978-01-05 | 1979-11-27 | New England Mutual Life Insurance Company | Counterfeit resistant document |
US4227720A (en) * | 1978-11-08 | 1980-10-14 | Burroughs Corporation | Protected document |
US4265469A (en) * | 1977-05-18 | 1981-05-05 | Burroughs Corporation | Protected document and method of making same |
US4310180A (en) * | 1977-05-18 | 1982-01-12 | Burroughs Corporation | Protected document and method of making same |
US4351547A (en) * | 1979-10-11 | 1982-09-28 | Burroughs Corporation | Security document and method for making same using an alternating dot pattern |
EP0066345A1 (en) * | 1981-05-28 | 1982-12-08 | Crown Cork & Seal Company, Inc. | Improved container and closure therefor |
US4579370A (en) * | 1982-09-10 | 1986-04-01 | Burroughs Corporation | Multi-tone cancellation phrase and background |
GB2173767A (en) * | 1985-04-03 | 1986-10-22 | Andrew James Smith | Security markings |
US4632430A (en) * | 1984-05-08 | 1986-12-30 | Wicker Ralph C | Secure and self-verifiable image |
US4668597A (en) * | 1984-11-15 | 1987-05-26 | Merchant Timothy P | Dormant tone imaging |
US4780397A (en) * | 1986-08-18 | 1988-10-25 | Hosokawa Printing Co., Ltd. | Process for preparing film positive sheets for forging-by-copying-proof prints and prints therefrom |
US4867481A (en) * | 1987-02-27 | 1989-09-19 | Nocopi International Inc. | Anti-photocopying paper and/or anti-telefacsimile paper |
WO1990008046A1 (en) * | 1989-01-18 | 1990-07-26 | Wicker Ralph C | Nonreplicable document and method for making same |
US5178418A (en) * | 1991-06-25 | 1993-01-12 | Canadian Bank Note Co., Ltd. | Latent images comprising phase shifted micro printing |
US5193853A (en) * | 1989-01-18 | 1993-03-16 | Wicker Ralph C | Nonreplicable document and method for making same |
US5197765A (en) * | 1991-07-12 | 1993-03-30 | The Standard Register Company | Varying tone securing document |
US5291243A (en) * | 1993-02-05 | 1994-03-01 | Xerox Corporation | System for electronically printing plural-color tamper-resistant documents |
US5312656A (en) * | 1993-02-05 | 1994-05-17 | Mattel, Inc. | Toy picnic set having latent image placemat |
US5340159A (en) * | 1991-07-12 | 1994-08-23 | The Standard Register Company | Varying tone security document |
FR2711945A1 (en) * | 1993-11-04 | 1995-05-12 | Moore Business Forms Inc | Method for producing a security feature on a document, and document obtained. |
US5436974A (en) * | 1993-10-12 | 1995-07-25 | Innovator Corporation | Method of encoding confidentiality markings |
US5449200A (en) * | 1993-06-08 | 1995-09-12 | Domtar, Inc. | Security paper with color mark |
US5488664A (en) * | 1994-04-22 | 1996-01-30 | Yeda Research And Development Co., Ltd. | Method and apparatus for protecting visual information with printed cryptographic watermarks |
US5487567A (en) * | 1992-04-24 | 1996-01-30 | Francois-Charles Oberthur Group | Printing method and copy-evident secure document |
US5722693A (en) * | 1996-10-03 | 1998-03-03 | Wicker; Kenneth M. | Embossed document protection methods and products |
US5734752A (en) * | 1996-09-24 | 1998-03-31 | Xerox Corporation | Digital watermarking using stochastic screen patterns |
US5735547A (en) * | 1992-10-01 | 1998-04-07 | Morelle; Fredric T. | Anti-photographic/photocopy imaging process and product made by same |
US5788285A (en) * | 1996-06-13 | 1998-08-04 | Wicker; Thomas M. | Document protection methods and products |
US5790703A (en) * | 1997-01-21 | 1998-08-04 | Xerox Corporation | Digital watermarking using conjugate halftone screens |
US6000728A (en) * | 1991-07-12 | 1999-12-14 | The Standard Register Company | Security document |
US6231082B1 (en) * | 1997-11-07 | 2001-05-15 | Documotion Research, Inc. | Tamper-evident form for securely carrying information |
US6430302B2 (en) * | 1993-11-18 | 2002-08-06 | Digimarc Corporation | Steganographically encoding a first image in accordance with a second image |
US6481753B2 (en) | 1998-10-30 | 2002-11-19 | Documotion Research, Inc. | Form for concealing variable printed information |
US20030039195A1 (en) * | 2001-08-07 | 2003-02-27 | Long Michael D. | System and method for encoding and decoding an image or document and document encoded thereby |
US6538757B1 (en) | 2000-05-19 | 2003-03-25 | Pitney Bowes Inc. | Method for automatically reading electronic tickets |
US6603568B1 (en) * | 2000-05-19 | 2003-08-05 | Pitney Bowes Inc. | System and method for issuing electronic tickets |
US6690811B2 (en) | 2000-12-08 | 2004-02-10 | The Hong Kong University Of Science And Technology | Methods and apparatus for hiding data in halftone images |
EP1398175A2 (en) | 2002-09-13 | 2004-03-17 | Agfa-Gevaert | Carrier of information bearing a watermark |
US20040084894A1 (en) * | 2002-10-30 | 2004-05-06 | Xerox Corporation | Anti-counterfeiting see-through security feature using line patterns |
WO2004110773A1 (en) | 2003-05-29 | 2004-12-23 | Document Security Systems, Inc. | Document containing security images |
US20050123134A1 (en) * | 1995-11-29 | 2005-06-09 | Graphic Security Systems Corporation | Digital anti-counterfeiting software method and apparatus |
US20060034483A1 (en) * | 2000-08-14 | 2006-02-16 | Au Oscar C | Methods and apparatus for hiding data in halftone images |
US20060061088A1 (en) * | 2004-09-23 | 2006-03-23 | Xerox Corporation | Method and apparatus for internet coupon fraud deterrence |
US20070201116A1 (en) * | 2002-10-10 | 2007-08-30 | Document Security Systems, Inc. | Double-blind security features |
US20070241554A1 (en) * | 2002-10-10 | 2007-10-18 | Document Security Systems, Inc. | Survivable security features for image replacement documents |
US20070246930A1 (en) * | 2002-10-10 | 2007-10-25 | Document Security Systems, Inc. | Document Containing Scanning Survivable Security Features |
US20070257977A1 (en) * | 2006-05-05 | 2007-11-08 | Document Security Systems, Inc. | Security enhanced print media with copy protection |
US20080048433A1 (en) * | 2002-10-10 | 2008-02-28 | Document Security Systems, Inc. | Single-color screen patterns for copy protection |
US20080138641A1 (en) * | 2006-12-07 | 2008-06-12 | Agfa-Gevaert | Information carrier precursor and information carrier produced therewith |
US20080138632A1 (en) * | 2006-12-07 | 2008-06-12 | Agfa-Gevaert | Information carrier precursor and information carrier produced therewith |
US20080136161A1 (en) * | 2006-12-07 | 2008-06-12 | Agfa-Gevaert | Method of producing an information carrier |
US20080136160A1 (en) * | 2006-12-07 | 2008-06-12 | Agfa-Gevaert | Method of producing an information carrier |
EP2006000A1 (en) * | 2007-06-07 | 2008-12-24 | Poligrafica S. Faustino S.p.A. | Coupon, in particular for competitions |
US20190276189A1 (en) * | 2018-01-11 | 2019-09-12 | Wilopen Products Lc | System and Method for Concealing Printed Matter |
PL425102A1 (en) * | 2018-03-30 | 2019-10-07 | Pol-Zdob Spółka Z Ograniczoną Odpowiedzialnością | Copy-protected overprint, preferably for the market product packaging |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3216991C2 (en) * | 1982-05-06 | 1984-08-09 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Sheet support on a support table |
JPH0683374B2 (en) * | 1986-02-14 | 1994-10-19 | 富士写真フイルム株式会社 | Method of forming halftone image |
DE3906944A1 (en) * | 1989-03-02 | 1990-09-13 | Francotyp Postalia Gmbh | METHOD FOR LABELING ORIGINAL PRINTS |
US5671277A (en) * | 1992-06-30 | 1997-09-23 | Minolta Camera Kabushiki Kaisha | Image forming apparatus and copy management system |
US6738491B1 (en) * | 1992-06-30 | 2004-05-18 | Minolta Co., Ltd. | Image forming apparatus and copy management system |
US5987127A (en) * | 1992-06-30 | 1999-11-16 | Minolta Co., Ltd. | Image forming apparatus and copy management system |
US7986806B2 (en) * | 1994-11-16 | 2011-07-26 | Digimarc Corporation | Paper products and physical objects as means to access and control a computer or to navigate over or act as a portal on a network |
US5708717A (en) * | 1995-11-29 | 1998-01-13 | Alasia; Alfred | Digital anti-counterfeiting software method and apparatus |
US5772250A (en) * | 1997-04-11 | 1998-06-30 | Eastman Kodak Company | Copy restrictive color-reversal documents |
US6870841B1 (en) | 2000-09-18 | 2005-03-22 | At&T Corp. | Controlled transmission across packet network |
US20030210803A1 (en) * | 2002-03-29 | 2003-11-13 | Canon Kabushiki Kaisha | Image processing apparatus and method |
US7180635B2 (en) * | 2002-05-30 | 2007-02-20 | Xerox Corporation | Halftone image gloss control for glossmarks |
US7193751B2 (en) * | 2002-12-12 | 2007-03-20 | Xerox Corporation | Tag control for runtime glossmarks |
CN100406273C (en) * | 2003-03-27 | 2008-07-30 | 图形安全系统公司 | System and method for authenticating objects |
US7634104B2 (en) * | 2003-06-30 | 2009-12-15 | Graphic Security Systems Corporation | Illuminated decoder |
US6980654B2 (en) * | 2003-09-05 | 2005-12-27 | Graphic Security Systems Corporation | System and method for authenticating an article |
US7421581B2 (en) * | 2003-09-30 | 2008-09-02 | Graphic Security Systems Corporation | Method and system for controlling encoded image production |
US7352493B2 (en) * | 2003-12-12 | 2008-04-01 | Xerox Corporation | Enhancement of glossmark images at low and high densities |
US7382495B2 (en) * | 2003-12-12 | 2008-06-03 | Xerox Corporation | Reduction of differential gloss |
US7512249B2 (en) * | 2004-04-26 | 2009-03-31 | Graphic Security Systems Corporation | System and method for decoding digital encoded images |
US7551752B2 (en) | 2004-04-26 | 2009-06-23 | Graphic Security Systems Corporation | Systems and methods for authenticating objects using multiple-level image encoding and decoding |
US7729509B2 (en) * | 2004-06-18 | 2010-06-01 | Graphic Security Systems Corporation | Illuminated lens device for use in object authentication |
US7301675B2 (en) * | 2004-06-29 | 2007-11-27 | Xerox Corporation | Glossmark images with clear toner |
US7304770B2 (en) * | 2004-08-30 | 2007-12-04 | Xerox Corporation | Reduction of differential gloss with halftoned clear toner |
EP1634722B8 (en) * | 2004-09-09 | 2009-10-07 | Alcan Technology & Management Ltd. | Article with forgery-proof printing |
US7391537B2 (en) * | 2004-09-28 | 2008-06-24 | Xerox Corporation | User interface for differential gloss images |
US7324241B2 (en) * | 2004-09-29 | 2008-01-29 | Xerox Corporation | Variable data differential gloss images |
US7339740B2 (en) * | 2005-07-16 | 2008-03-04 | Winkelhorn Karin-Maria K | Image decoder system |
US8090141B2 (en) | 2006-01-31 | 2012-01-03 | Xerox Corporation | System and method to automatically establish preferred area for image-wise watermark |
US7860268B2 (en) | 2006-12-13 | 2010-12-28 | Graphic Security Systems Corporation | Object authentication using encoded images digitally stored on the object |
US8248661B2 (en) * | 2007-02-12 | 2012-08-21 | Xerox Corporation | Color-consistent three level differential gloss images |
SG189354A1 (en) | 2010-10-11 | 2013-05-31 | Graphic Security Systems Corp | Method for constructing a composite image incorporating a hidden authentication image |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1002600A (en) * | 1909-08-14 | 1911-09-05 | Edward Robert Morris | Means for detecting counterfeit bank-notes, bonds, coupons, and the like. |
US1928758A (en) * | 1931-05-18 | 1933-10-03 | Robert A Mairson | Method and means of color printing |
US2030351A (en) * | 1932-10-31 | 1936-02-11 | Waterlow & Sons Ltd | Method of applying protective coloring in the printing of documents representing value |
US2048780A (en) * | 1933-08-09 | 1936-07-28 | Waterlow & Sons Ltd | Method of applying protective coloring in the printing of documents representing value |
US2952080A (en) * | 1957-09-12 | 1960-09-13 | Teleregister Corp | Cryptic grid scrambling and unscrambling method and apparatus |
US3279095A (en) * | 1961-10-24 | 1966-10-18 | Ncr Co | Information encoding and decoding method |
US3288059A (en) * | 1965-10-20 | 1966-11-29 | Edward R Atkinson | Color reproduction |
US3381612A (en) * | 1964-02-15 | 1968-05-07 | Salvat Editores | Color reproducing system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2059197A (en) * | 1935-05-17 | 1936-11-03 | Ralph P Rockwood | Counterfeit paper money detector |
US3256770A (en) * | 1962-04-10 | 1966-06-21 | Carlson Co Chesley F | Lithographic color analyzer |
US3425770A (en) * | 1965-12-01 | 1969-02-04 | Technical Operations Inc | Superimposed photostorage and separation |
US3599147A (en) * | 1967-09-12 | 1971-08-10 | Nat Res Dev | Character recognition systems and apparatus |
-
1969
- 1969-09-10 US US856663A patent/US3675948A/en not_active Expired - Lifetime
-
1971
- 1971-07-26 US US00167058A patent/US3784289A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1002600A (en) * | 1909-08-14 | 1911-09-05 | Edward Robert Morris | Means for detecting counterfeit bank-notes, bonds, coupons, and the like. |
US1928758A (en) * | 1931-05-18 | 1933-10-03 | Robert A Mairson | Method and means of color printing |
US2030351A (en) * | 1932-10-31 | 1936-02-11 | Waterlow & Sons Ltd | Method of applying protective coloring in the printing of documents representing value |
US2048780A (en) * | 1933-08-09 | 1936-07-28 | Waterlow & Sons Ltd | Method of applying protective coloring in the printing of documents representing value |
US2952080A (en) * | 1957-09-12 | 1960-09-13 | Teleregister Corp | Cryptic grid scrambling and unscrambling method and apparatus |
US3279095A (en) * | 1961-10-24 | 1966-10-18 | Ncr Co | Information encoding and decoding method |
US3381612A (en) * | 1964-02-15 | 1968-05-07 | Salvat Editores | Color reproducing system |
US3288059A (en) * | 1965-10-20 | 1966-11-29 | Edward R Atkinson | Color reproduction |
Cited By (88)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3961956A (en) * | 1972-09-26 | 1976-06-08 | Fuji Photo Film Co., Ltd. | Method for production of and distinction between combined validification and identification photographs |
US4039066A (en) * | 1974-02-07 | 1977-08-02 | Sweda International, Inc. | Forgery-resistant impact printing with matrix printer |
US4040353A (en) * | 1974-10-31 | 1977-08-09 | Opi Metriservice, Societe Anonyme | Process for coloring surfaces |
US4143967A (en) * | 1976-07-30 | 1979-03-13 | Benjamin J. Haggquist | Latent photo system |
US4265469A (en) * | 1977-05-18 | 1981-05-05 | Burroughs Corporation | Protected document and method of making same |
US4310180A (en) * | 1977-05-18 | 1982-01-12 | Burroughs Corporation | Protected document and method of making same |
US4168088A (en) * | 1977-12-15 | 1979-09-18 | Burroughs Corporation | Protected document and method of making the same |
US4175776A (en) * | 1978-01-05 | 1979-11-27 | New England Mutual Life Insurance Company | Counterfeit resistant document |
US4227720A (en) * | 1978-11-08 | 1980-10-14 | Burroughs Corporation | Protected document |
US4351547A (en) * | 1979-10-11 | 1982-09-28 | Burroughs Corporation | Security document and method for making same using an alternating dot pattern |
EP0066345A1 (en) * | 1981-05-28 | 1982-12-08 | Crown Cork & Seal Company, Inc. | Improved container and closure therefor |
US4579370A (en) * | 1982-09-10 | 1986-04-01 | Burroughs Corporation | Multi-tone cancellation phrase and background |
US4632430A (en) * | 1984-05-08 | 1986-12-30 | Wicker Ralph C | Secure and self-verifiable image |
US4684593A (en) * | 1984-05-08 | 1987-08-04 | Secure Images Inc. | Secure and self-verifiable image |
US4668597A (en) * | 1984-11-15 | 1987-05-26 | Merchant Timothy P | Dormant tone imaging |
GB2173767A (en) * | 1985-04-03 | 1986-10-22 | Andrew James Smith | Security markings |
US4780397A (en) * | 1986-08-18 | 1988-10-25 | Hosokawa Printing Co., Ltd. | Process for preparing film positive sheets for forging-by-copying-proof prints and prints therefrom |
US4867481A (en) * | 1987-02-27 | 1989-09-19 | Nocopi International Inc. | Anti-photocopying paper and/or anti-telefacsimile paper |
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