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:
Oct. 30, 1979
Filed:
Jul. 19, 1978
Shuji Ogino, Osaka, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A wide angle zoom lens system having a front lens group of a positive refractive power with an extended zoom ratio. A second lens group is located adjacent the first lens group and has sufficient negative refractive power so that the combined refractive power of the first and second lens group is negative. The first and second lens groups are movable as a fixed unit for a zooming operation in a first zoom range defined between the shortest focal length and a medium focal length. These same lens groups are separable for a zooming operation in a second zoom range between the medium focal length and the longest focal length.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile