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:
Jan. 08, 1991
Filed:
Dec. 19, 1988
Applicant:
Inventor:
Ronald W Froelich, Covina, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
356 71 ; 382-4 ;
Abstract
An identification system including an exemplar fingerprint on an identification card which is to be compared using autocorrelation with a fingerprint of the presenter of the card. Additionally, waveforms generated during the autocorrelation step are compared with similar waveforms taken at the time the card is issued and recorded in a read only memory within the card. This latter comparison assures that the exemplar has not been tampered with.