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:
Jul. 07, 2009
Filed:
Mar. 05, 2007
Applicants:
Chih-chang Chou, Taipei County, TW;
Jung-yao Chen, Taoyuan County, TW;
Inventors:
Chih-Chang Chou, Taipei County, TW;
Jung-Yao Chen, Taoyuan County, TW;
Assignee:
BenQ Corporation, Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 5/02 (2006.01); G09G 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The optical system comprises a light source, a first optical element, a projecting lens, and an electromagnetic-wave sensor. Light from the light source passes the first optical element and the lens sequentially to reach a screen, and light reflected by the screen passes the lens and reaches the electromagnetic-wave sensor via the first optical element.
Chou, Chih-Chang. (2009). Optical system and projector utilizing the same (U.S. Patent No. 7557341). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7557341
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile