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. 30, 1976
Filed:
May. 15, 1974
Applicant:
Inventor:
Joseph E Murray, Jr, Malden, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
352 72 ; 352173 ; 242205 ;
Abstract
Photographic processing and projector apparatus having a drive system including a gear train for advancing and rewinding the film on spools within a film cassette. Included in the gear train is an inertia dumper which is operative at the conclusion of a high speed rewind run to reduce film tension and cassette shock caused by the abrupt cessation of film movement at the end of the film.
Murray, Jr, Joseph. (1976). Photographic film drive system employing inertia dumper (U.S. Patent No. 3947187). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3947187
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile