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. 20, 1988
Filed:
Apr. 23, 1987
Yasuzi Ogata, Tokyo, JP;
Tatsuo Inabata, Tokyo, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A compact zoom lens system comprising a first lens group having positive refractive power, a stop, and a second lens group having negative refractive power in the order from the object side wherein the first lens group comprises at least two positive lenses and at least one negative lens, and the second lens group comprises a positive lens and a negative lens and which is arranged to be zoomed by varying the airspace between the first and second lens groups, the compact zoom lens system being arranged to have the desired back focal length and a short overall length and being arranged that aberrations are corrected favorably, the compact zoom lens system being thereby arranged to be the most suitable for the use with a camera with a lens shutter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile