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, 2000
Filed:
Feb. 22, 1999
Applicant:
Inventors:
Katsuyoshi Takeshita, Nagano, JP;
Kunihiko Yano, Nagano, JP;
Yoshihiko Kasai, Nagano, JP;
Toshiya Otsuki, Nagano, JP;
Assignees:
Seiko Epson Corporation, Tokyo, JP;
World Munsell Co., Ltd., Tsu, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
351163 ; 351166 ; 351177 ;
Abstract
An inexpensive, high-performance, color vision correcting plastic eyeglass lens comprises a partial reflection film for partially reflecting light, or a coloring agent for partially absorbing light, or a combination thereof, so that an intended color vision rectifying spectral characteristic curve can be established in or imparted to the lens.