The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 1995
Filed:
Nov. 24, 1993
Applicant:
Inventors:
A Lawrence Spitz, Palo Alto, CA (US);
Lynn D Wilcox, Portola Valley, CA (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382296 ; 382317 ;
Abstract
A method and apparatus for identifying documents and classes of documents. The documents are provided with distinctive logotypes which are preferably at the top of each document. The coding of the logotypes is by the use of distinctive angular alignments in the logotype. The logotype is scanned at different angles in order to determine angular 'signatures' for comparison with a predetermined power distribution.