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:
May. 26, 1992
Filed:
Sep. 04, 1990
Applicant:
Inventors:
Jennifer K Ellwood, Somerville, MA (US);
John P Gaewsky, Reading, MA (US);
James C Magno, Jr, Center Barnstead, NH (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
354415 ; 354416 ; 354137 ;
Abstract
The depth of field of a fixed focus lens in an electronic flash camera is automatically increased and the sharpness or clarity of an image formed by the lens is improved for subjects located closer to the camera than the near end of the lens' normal depth of field by firing the camera's electronic flash at an aperture size that is smaller than one that would normally be used for such closer subjects.
Ellwood, Jennifer. (1992). Electronic flash control system for use in a fixed focus lens camera for (U.S. Patent No. 5117252). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5117252
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile