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. 13, 2007
Filed:
Oct. 12, 2005
Applicants:
Takayuki Sugiyama, Utsunomiya, JP;
Nobuyuki Tochigi, Utsunomiya, JP;
Motomu Fukasawa, Tokorozawa, JP;
Kazuyuki Kondo, Saitama, JP;
Inventors:
Takayuki Sugiyama, Utsunomiya, JP;
Nobuyuki Tochigi, Utsunomiya, JP;
Motomu Fukasawa, Tokorozawa, JP;
Kazuyuki Kondo, Saitama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A zoom lens comprises, from the object side to the image side, a first lens group, a second lens group, and a rear group including one or more lens groups, where the first and second lens groups can move at the time of zooming, and wherein the first lens group comprises, from the object side to the image side, a first lens of negative refractive power, and a second lens of positive refractive power.