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:
Aug. 24, 1993
Filed:
May. 20, 1991
Applicant:
Inventor:
James E Thomas, Issaquah, WA (US);
Assignee:
Microscan Systems Incorporated, Tukwila, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
235462 ; 250216 ;
Abstract
A bar code reader having a scanned light and a stationary photodetector is disclosed. The photo detector uses a lens having a pyramidal frusta-like body to concentrate light. The input side has a pair of oppositely angles side planes facing opposite extremities of a scanned label. The faces can be used to mount filters to reject ambient light, and a polarizer can be used to reject specular reflection from the scanning laser.