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:
Apr. 03, 1990
Filed:
Nov. 07, 1988
Applicant:
Inventor:
Hiroshi Takase, Tokyo, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350422 ; 350254 ;
Abstract
A vari-focal lens system with switchable auxiliary lens units comprising a master lens system, an auxiliary lens unit removably arranged after the master lens system and another auxiliary lens unit removably arranged after said auxiliary lens unit, said vari-focal lens system being so adapted as to permit photographing at multiple different focal lengths by speedy switching operation with a simple mechanism.