1
Mahon Michael J, Huck Jerome C, Morris Dale C: Method and apparatus for embedding identification codes in printed documents.. Hewlett Packard Co, December 21, 1994: EP0629972-A2 (161 worldwide citation)

A method and apparatus (1203, 1403) for embedding identification information in documents. The present invention embeds information in each copy of a document (1207, 1407) such that a particular copy of the document is distinguishable from all other copies of the same document. Additionally, this em ...


2
Baltes Heinrich Peter, Romerio Michel Vincent: Kinoform.. Landis & Gyr, April 27, 1983: EP0077464-A2 (152 worldwide citation)

1. A method of producing a kinoform wherein the amplitude distribution function of a plurality of discrete picture elements of an image which is to be reproduced by the kinoform upon coherent irradiation, is established, recorded and converted by computer means into the associated phase distribution ...


3
Klein John, Woloschin Steve, Sanders Robert, Katz Joseph, Patel Methul, Swartz Jerome, Swift Philip, Herrod Allan, Mulla Altaf, Lert John, Tan Chinh, Barkan Edward, Sheppard Howard, Jwo Chin Hung: Data retrieval system and method. Symbol Technologies, April 22, 1998: EP0837406-A2 (114 worldwide citation)

Various problems arise in accessing the Internet. For example, Internet files have complex file addresses which are prone to incorrect entry by a user, giving rise to access of unwanted files. In one aspect the invention solves this problem by encoding the file address in a bar code symbol, decoding ...


4
Oshima Mitsuaki, Gotoh Yoshiho, Tanaka Shinichi, Koishi Kenji, Moriya Mitsurou, Takemura Yoshinari: Optical disk, optical recorder, optical reproducing device, encrypted communication system, and authorizing system for use of program. Matsushita Electric, October 22, 1997: EP0802527-A1 (103 worldwide citation)

The operating and other procedures of an optical disk application system of the type for which a network is used are simplified. Optical disks have auxiliary data recording areas, where different IDs for individual disks, and/or cipher keys and/or decoding keys for ciphers are recorded in advance in ...


5
Marcy Raymond: Electro-optical image-tracing systems, particularly for use with laser beams. Thompson CSF, January 4, 1972: US3632205 (96 worldwide citation)

To provide for digital positioning, without inertia of moving parts, a laser beam is transmitted to a substrate which is to be exposed, etched, or the like, particularly when microcircuits are to be produced, by monitoring the displacement of the substrate, mechanically, in two mutually perpendicula ...


6
Sunman Peter Robert Peter: Credit, identity or like cards. Sunman Peter Robert Peter, August 21, 1991: GB2240948-A (91 worldwide citation)

A plastics card, such as a credit or identity card, has a plurality of layers (13 to 18) of different colours with at least the top layer etched away in a pattern representing a personalised information such as a name, signature, photograph or finger print. The personalised information may be in mac ...


7
Philipson Jr Herman L: System for document coding and identification. Recognition Equipment Incorporated, November 21, 1972: US3703628 (89 worldwide citation)

Method and apparatus for sensing human readable intelligence bearing indicia on documents with high resolution, by generating primary signals representatives of said indicia with translation thereof into simplified bar code, printing the simplified code on the document itself, preferably during cont ...


8
Becker Carl H, Dell Harold R, French Ballard D, Hashiguchi Masao, McFarland Keith E, Wong Herman: Laser recording system using drum mounted record strips. Precision Instrument Company, April 4, 1972: US3654624 (88 worldwide citation)

A laser recording system for scanning a modulated laser beam in spaced parallel lines across a flat elongated strip of energy absorbing material and for ablating minute regions from the material in a linear pattern representing digital bits according to the intensity of the modulating signal. The fl ...


9
Oshima Mitsuaki, Gotoh Yoshiho: Marking generating apparatus, method of forming laser marking on optical disk, reproducing apparatus, optical disk and optical disk producing method. Matsushita Electric, November 6, 1996: EP0741382-A1 (78 worldwide citation)

An object of the present invention is to provide a marking forming apparatus, a method of forming a laser marking on an optical disk, a reproduction apparatus, an optical disk, and a method of manufacturing an optical disk, capable of providing a greatly improved copy prevention capability as compar ...


10
Pavlidis Theodosios, Wang Ynjuin Paul, Swartz Jerome: High density two dimensional symbology.. Symbol Technologies, August 7, 1991: EP0439682-A2 (75 worldwide citation)

A non-volatile electro-optical read-only memory includes a substrate on which is printed (or otherwise inscribed) a complex symbol or "label" with a high density two-dimensional symbology, a variable number of component symbols or "codewords" per row, and a variable number of rows. Codewords in alte ...