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. 01, 1988
Filed:
May. 26, 1987
Shinya Yomogizawa, Kanagawa, JP;
Kiyoshi Ikuta, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This patent application discloses a device for protecting the photographic optical system of a camera having a first detector for detecting that the back cover of the camera is open or closed and a second detector for detecting whether or not the film is winding on the takeup spool, wherein when that the back cover is open or that the film is not winding on the spool is detected by the first and second detectors, either the rear of the photographic optical system is shut off, or the photographic optical system is moved forward, so that the rear vertex of the photographic optical system is prevented from being touched with a finger or the edge of the film leader.