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:
Nov. 10, 1998
Filed:
Nov. 22, 1996
Applicant:
Inventor:
Richard R Martin, Honeoye Falls, NY (US);
Assignee:
Wilmington Partners L.P., Wilmington, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02V / ;
U.S. Cl.
CPC ...
351161 ; 3511 / ; 3511 / ;
Abstract
The present invention relates to a multifocal contact lens having an edge, a front and back side and a series of concentrically arranged zones comprising central zone, a marginal zone and a peripheral zone. Each of the zones on the back side of the lens is defined by a second-order surface of revolution other than spherical. The front side of the lens comprises multiple spherical surfaces for providing increasing power correction from the central zone toward the peripheral zone.