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. 24, 1995
Filed:
Nov. 30, 1993
Applicant:
Inventor:
Paul L Ruben, Penfield, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359689 ; 359695 ;
Abstract
A zoom camera lens which is particularly compact, has a small number of elements and is capable of good performance at relatively wide aperture has a front negative lens group, a middle positive lens group and a rear negative lens group. The rear negative lens group has a focal length not more than 1.25 times the focal length of the middle positive lens group. Preferably, the lens has seven or eight elements and is designed without the use of aspheres.