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:
Sep. 11, 1990
Filed:
Jul. 18, 1989
Applicant:
Inventors:
Assignee:
Optische werke G. Rodenstock, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
351169 ; 351172 ;
Abstract
A multifocal lens is described with a main lens designed for distance vision and a segment designed for near vision. The lens in accordance with the present invention is characterized by the fact that one surface of the segment consists of the progression area and the reading portion of a progressive surface. In an advantageous further development the progressive surface whose progression area and reading portion form one surface of the segment is designed in such a way that its surface astigmatism is concentrated essentially in the distance portion.
Barth, Rudolf. (1990). Multifocal lens (U.S. Patent No. 4955712). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4955712
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile