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:
Feb. 19, 2013
Filed:
Aug. 23, 2011
Applicant:
Daisaku Arai, Kawasaki, JP;
Inventor:
Daisaku Arai, Kawasaki, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 27/64 (2006.01);
U.S. Cl.
CPC ...
Abstract
A zoom lens having, in order from an object, a first lens group Ghaving negative refractive power, a second lens group Ghaving positive refractive power, and a third lens group GHhaving positive refractive power, wherein the second lens group Gis constituted only by three or more cemented lenses.