Communications: electrical – Continuously variable indicating – With meter reading
Patent
1985-04-29
1987-05-05
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
235380, G06K 500, G06F 704
Patent
active
046636226
ABSTRACT:
A system for authenticating an object on the basis of certain physical phenomena or character, specifically, measurable, but not practicably duplicable random variations in the object. In one form, the object (authenticator (T)) is a paper tag having a reference space (14), the varying translucency pattern or which is a measurable but practicably unduplicable characteristic of the paper. The reference space (14) is sensed to provide reference signals indicative of the varying translucency. A reference numeral (10) is then provided from some registered form, as on the tag or in a list. If the numeral (10) is readily accessible, it likely will be cryptographically encoded. Note the value of putting encoded information on the tag to avoid the need for large reference files.
For verification, freshly sensed reference signals, as from the tag (T) (actually characteristic of the tag) are compared with signals that previously were sensed as characteristic of the tag (T). Structures are disclosed as specific forms of the authenticator (T), along the apparatus for authenticator production, detection and manipulation. Different forms of tags (210) are disclosed, the measurable characteristic of which involves light transmissivity and reflectivity. Apparatus (111) for spectrographic confirmation of tag material is also disclosed. In an illustrative form of a tag (T) as an identification means, tags and processing apparatus utilize magnetic medium (218) and printed images (214). The magnetic medium is also disclosed to be recorded as for developing information on shelf life and sales channels.
REFERENCES:
patent: 4325570 (1982-04-01), Estrada
patent: 4450348 (1984-05-01), Stockburger et al.
patent: 4469937 (1984-09-01), Stockburger et al.
patent: 4476382 (1984-10-01), White
"What The Printer Should Know About Paper", William H. Bureau, Graphics Aristechnical Foundation of Pittsburgh, Pa., 1982, Library of Congress Catalog Car Number 81-86238.
Light Signatures, Inc.
Yusko Donald J.
LandOfFree
Non-counterfeitable document system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-counterfeitable document system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-counterfeitable document system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2401182