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:
Apr. 04, 2006
Filed:
Jul. 09, 2003
Applicant:
Moriyasu Shirayanagi, Saitama-ken, JP;
Inventor:
Moriyasu Shirayanagi, Saitama-ken, JP;
Assignee:
PENTAX Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C 7/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is provided a multifocal spectacle lens having a front surface and a back surface each of the front surface and the back surface is formed as a multifocal surface or a progressive-power surface, distributions of surface power of the front surface and the back surface being different from each other.