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:
Nov. 14, 2017
Filed:
Feb. 24, 2015
Sony Corporation, Tokyo, JP;
Masaharu Hosoi, Kanagawa, JP;
SONY CORPORATION, Tokyo, JP;
Abstract
A zoom lens includes, in order from an object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, a third lens group having a positive refractive power, and a fourth lens group having a negative refractive power, the fourth lens group having at least two positive lenses, the zoom lens satisfying a conditional expression (a) of −2.0<f3/f4<−0.35 where f3 indicates a focal length of the third lens group and f4 indicates a focal length of the fourth lens group.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile