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:
Sep. 19, 2017
Filed:
Dec. 16, 2015
Applicant:
Ricoh Company, Ltd., Tokyo, JP;
Inventors:
Yohei Takano, Kanagawa, JP;
Hibiki Tatsuno, Kanagawa, JP;
Nobuyuki Arai, Kanagawa, JP;
Hirotoshi Nakayama, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 17/08 (2006.01); G03B 21/28 (2006.01); G02B 13/16 (2006.01); G02B 3/04 (2006.01); G02B 5/10 (2006.01); G03B 21/14 (2006.01);
U.S. Cl.
CPC ...
G02B 17/08 (2013.01); G02B 3/04 (2013.01); G02B 5/10 (2013.01); G02B 13/16 (2013.01); G02B 17/0852 (2013.01); G02B 17/0896 (2013.01); G03B 21/28 (2013.01); G03B 21/14 (2013.01);
Abstract
There is provided a projection optical system capable of projecting an image formed on an image forming unit on a projection plane, which has an extremely short projection distance and a small size.
Takano, Yohei. (2017). Projection optical system and image display apparatus including a refraction optical system and first and second reflecing surfaces (U.S. Patent No. 9766438). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9766438
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile