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. 24, 2015
Filed:
Mar. 07, 2012
Kazutoshi Kato, Kamiina-gun, JP;
Yohei Suzuki, Kamiina-gun, JP;
Ayumu Ito, Kamiina-gun, JP;
Toshihide Shinohara, Chino, JP;
Tadashi Kaga, Kamiina-gun, JP;
Kazutoshi Kato, Kamiina-gun, JP;
Yohei Suzuki, Kamiina-gun, JP;
Ayumu Ito, Kamiina-gun, JP;
Toshihide Shinohara, Chino, JP;
Tadashi Kaga, Kamiina-gun, JP;
Hoya Lens Manufacturing Philippines Inc., Cavite, PH;
Abstract
A progressive-power lens has one surface which satisfies the following expressions()=()()>()where CT(DP) denotes a vertical direction curvature at the distance reference point, CY(DP) denotes a horizontal direction curvature, CY(P) denotes a horizontal direction curvature at a point on the principal meridian which is located further on the near portion than the progressive start point, and CT(P) denotes a vertical direction curvature at the point.