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:
Mar. 28, 2006
Filed:
Dec. 02, 2003
Applicants:
Norio Sato, Tokyo, JP;
Toshiharu Suzuki, Saitama, JP;
Inventors:
Norio Sato, Tokyo, JP;
Toshiharu Suzuki, Saitama, JP;
Assignee:
PENTAX Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 5/22 (2006.01); G02B 26/02 (2006.01); H04N 5/238 (2006.01); G03B 21/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lens barrel includes an optical system including a short focal length for a wide angle of view; and an ND filter in the shape of a disc which is provided on an optical axis of the optical system. An optical density of the ND filter decreases in a direction radially outwards from a center of the ND filter.
Sato, Norio. (2006). Lens barrel (U.S. Patent No. 7019917). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7019917
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile