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:
Jun. 25, 1985
Filed:
Jun. 08, 1983
Applicant:
Inventor:
Tsuneyo Metabi, Sakai, JP;
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350450 ; 350429 ;
Abstract
A zoom lens assembly for use with a photographic camera having a capability of functioning two different modes one at a time. In one mode, the lens assembly is of a type having its aperture ratio variable with change in focal length, and in the other mode, it is of a type wherein change in aperture ratio resulting from the change in focal length is compensated for to give a uniform aperture ratio at all focal length settings. For this purpose, a unique change-over mechanism is built in the lens assembly for switching the lens assembly from one of the different modes onto the other of the different modes at the will of a photographer.