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. 23, 1980
Filed:
Jan. 09, 1979
Applicant:
Inventor:
Takahiro Sugiyama, Tokyo, JP;
Assignee:
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350216 ;
Abstract
A semi-wide angle photographic lens having short overall length is disclosed comprising six lens elements grouped into five components. The fourth component is composed of negative and positive lenses cemented each other to have a positive resultant focal length. The lens system has an aperture ratio of 1:2.8 and a view angle of .+-.24.degree..