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:
Mar. 05, 1985
Filed:
Jan. 31, 1983
Applicant:
Inventors:
John P Gaewsky, Reading, MA (US);
Joseph E Murray, Jr, Malden, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354403 ;
Abstract
An economical dual zone active rangefinding system for a photographic camera operates upon the principle of triangulation without lateral displacement of either the radiation source or detector to provide an output signal indicative of whether the subject in the scene to be photographed is located in a select distance range from the photographic camera.
Gaewsky, John. (1985). Two zone infrared ranging system (U.S. Patent No. 4502773). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4502773
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile