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:
May. 28, 1991
Filed:
Sep. 12, 1990
Yoshiaki Tanabe, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A focal-plane shutter device comprises aperture opening blades including a blade with an edge for forming an exposure slit, aperture closing blades including a blade with an edge for forming the exposure slit, first and second base plates disposed between the aperture opening blades and the aperture closing blades and each having an aperture for forming an exposure aperture, and a means for spacing the first and second base plates by a predetermined distance. According to the above composition, even is the slit forming edge of the blade of the aperture closing blades is moved at high speed, it is prevented from colliding with the first and second base plates.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile