Document Type and Number:
Japanese Patent JPS6134191
Kind Code:
B2
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.
Inventors:
ARETSUKUSU NIFUERAA
DABITSUDO ERU GURIINAUEI
HAINTSU RAINHARUDO
DABITSUDO ERU GURIINAUEI
HAINTSU RAINHARUDO
Application Number:
JP7382178A
Publication Date:
August 06, 1986
Filing Date:
June 20, 1978
Export Citation:
Assignee:
ERU GEE TSUETSUTO RANDEISU UNTO GIIRU TSUUKU AG
International Classes:
G07B11/02; G06K5/00; G06K7/00; G06K7/10; G06K7/12; G06K17/00; G06K19/16