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:
Jan. 07, 1992
Filed:
Feb. 12, 1987
Takanori Kodaira, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention discloses an improvement of a filter apparatus for cameras and particularly discloses various arrangements for improving the filter apparatus for cameras in which, for example, an operating means for placing a filter in and taking it out of the optical path is provided so that the operating means automatically removes the filter from the optical path by stopping the operations of filter photography at the completion thereof. Thus, a photograph can be prevented from mistakenly being taken with the filter still in place in the optical path, and protective means for preventing damage of the filter surface is provided on the filter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile