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:
Oct. 27, 2009
Filed:
Jun. 01, 2007
Makoto Sato, Tachikawa, JP;
Makoto Sato, Tachikawa, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
There is provided a projection lens for a projector which utilizes a reflection type display device, comprising a movable aperturewhich is movable as a movable lens components moves, wherein an openingin the movable apertureis formed into a circular shape which is centered at the center of an optical axisof the projection lens and has a swollen portionon part of the openingin such a manner as to project from a circumferential portion in a direction of the center of a beam of stray light into the interior of the opening
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile