Method and device for identifying documents

Details Method and device for identifying documents Method and device for identifying documents

1978-06-06

1980-07-08

Kilgore, Robert M.

Registers

Coded record sensors

Particular sensor structure

350162SF, 235487, G06K 710, G02B 518, G06K 1900

Patent

active

042119189

ABSTRACT:
A method and device for identifying documents. A multiplicity of machine-readable markings which characteristically modify incident light by diffraction or refraction are applied to the documents, and selected markings are then cancelled out, the remaining markings representing coded information. The markings are of at least two different kinds causing different modification of incident light, and are arranged in a characteristic configuration on the documents. Information about said configuration is stored in an identification device to permit checking of the remaining markings.

REFERENCES:
patent: 2735617 (1956-02-01), Knutsen
patent: 3643216 (1972-02-01), Greenaway
patent: 3814904 (1974-06-01), Russell
patent: 3873813 (1975-03-01), Lahr
patent: 3919447 (1975-11-01), Kilmer
patent: 4011435 (1977-03-01), Phelps
patent: 4014602 (1977-03-01), Ruell
patent: 4020278 (1977-04-01), Carre
patent: 4023010 (1977-05-01), Horst
patent: 4034211 (1977-07-01), Horst

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