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:
Aug. 27, 1985
Filed:
Sep. 10, 1984
Applicant:
Inventors:
Toshihide Shinohara, Suwa, JP;
Sakiho Okazaki, Suwa, JP;
Assignee:
Kabushiki Kaisha Suwa Seikosha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
351169 ;
Abstract
Progressive multifocal ophthalmic lenses are provided having a far vision viewing zone, a near vision viewing zone and an intermediate vision viewing zone therebetween. A principal meridian curve extends vertically through the far, intermediate and near vision viewing zones. The surface power along the principal meridian curve in the intermediate vision viewing zone varies progressively. The sizes of the zones and configuration of the zones are set by predetermined conditions and equations. The construction provides improved lenses for use in activities such as sports, driving, shopping and the like.