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:
Jul. 06, 1999
Filed:
Mar. 01, 1996
Yasuzi Ogata, Akiruno, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A Keplerian variable magnification finder includes an objective system having a positive refracting power, an image erecting system for erecting an intermediate image formed by the objective system, and an eyepiece system having a positive refracting power. The objective system is composed of a first lens unit having a negative refracting power, a second lens unit having a positive refracting power, a third lens unit having a positive refracting power, and a fourth lens unit having a negative refracting power. At least two of these four lens units are moved along the optical axis so that the magnification of the finder is changed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile