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:
Feb. 28, 2006
Filed:
Apr. 04, 2003
Applicants:
Yuhei Sumiyoshi, Tochigi, JP;
Masayuki Suzuki, Tochigi, JP;
Inventors:
Yuhei Sumiyoshi, Tochigi, JP;
Masayuki Suzuki, Tochigi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 27/52 (2006.01); G03B 27/54 (2006.01); G03B 27/42 (2006.01); G03B 27/68 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection optical system includes an optical element that includes and locally uses a reflective or refractive area that is substantially axially symmetrical around an optical axis, the optical element being rotatable around the optical axis.
Sumiyoshi, Yuhei. (2006). Projection optical system, exposure apparatus and method using the same (U.S. Patent No. 7006194). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7006194
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