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:
Jul. 14, 1998
Filed:
Apr. 28, 1997
Applicant:
Inventor:
Ryuichi Kobayashi, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
396529 ; 396544 ;
Abstract
In a camera system arranged to communicate data between a camera and an accessory mounted on the camera in synchronism with a clock signal, the lens communicates data to the camera by a first communication method (an open drain method), and, if it is determined as a result of the data communication that the lens mounted on the camera is a lens suited for high-speed communication, the first communication method is switched to a second communication method suited for high-speed communication, so that communication can be performed at a high speed.