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. 19, 2003
Filed:
Aug. 06, 1997
Toshiaki Mabuchi, Tokyo, JP;
Yoshikazu Nishikawa, Kanagawa-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An interchangeable lens camera system including a camera body and a lens detachably attached to the camera body. A camera-side control unit is disposed in the camera body and produces a control command. A lens-side control unit is disposed in the lens unit and produces status information indicating a plurality of functions in the lens unit. A communication unit transmits the control command outputted from said camera-side control unit to the lens-side control unit and transmits back the status information from the lens-side control unit to the camera. The lens-side control unit transmits a controllable function and an uncontrollable function to the camera-side control unit at the time of initial communication between the camera-side control unit and the lens-side control unit. The camera-side control unit does not transmit the control command in connection with the uncontrollable function, while the lens-side control unit transmits the status information concerning the uncontrollable function to the camera-side control unit, at the time of control communication after termination of the initial communication.