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:
Feb. 27, 1990
Filed:
Mar. 22, 1989
Applicant:
Inventors:
Ko Asai, Tokyo, JP;
Koichiro Morita, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382-4 ; 356 71 ;
Abstract
An image input device for optically sensing a fingerprint or like pattern to convert it to an electrical signal is disclosed. A guide is provided on a contact surface, or reflective surface, of a prism to orient the lengthwise direction of the pattern of an object parallel to a ridge, which is defined by an incidence surface and a wayout surface of the prism.