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. 03, 1976
Filed:
Dec. 04, 1973
Applicant:
Inventors:
Eiichi Yamazaki, Ichihara, JA;
Toshio Ueda, Mobara, JA;
Koichi Maruyama, Mobara, JA;
Iwao Ogura, Tokyo, JA;
Assignee:
Hitachi, Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G03B / ;
U.S. Cl.
CPC ...
350189 ; 3501 / ; 354-1 ;
Abstract
In a correction lens wherein the effective surface thereof has at least a lens member having no island shaped portion, said member being defined by the step shaped border line never closing by themselves to form an island shaped lens segment on said correction lens surface.