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. 11, 1998
Filed:
Aug. 05, 1996
Applicant:
Inventors:
Shigeru Oshima, Kanagawa-ken, JP;
Takashi Kamai, Tokyo, JP;
Yoshiharu Nakamura, Kanagawa-ken, JP;
Yasuhiro Izumi, Kanagawa-ken, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
396435 ;
Abstract
For a camera of the kind permitting change-over of the aspect ratio of its image pickup area from one aspect ratio to another, an optical system and an apparatus using the optical system are arranged to be capable of preventing the angle of view of a zoom lens from being changed by the change-over of the aspect ratio.