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:
Jan. 27, 1981
Filed:
Jan. 16, 1979
Applicant:
Inventors:
Erwin J Daniels, Aalen, DE;
Siegfried Korn, Oberkochen, DE;
Assignee:
Carl Zeiss-Stiftung, Oberkochen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
351171 ;
Abstract
A multifocal spectacle lens having a single base lens member and at least two additional parts adjacent to each other, attached to the base lens member by fusing or cementing. These additional parts are so shaped that imaginary tangential planes lying in the center of separation lines between the additional parts and tangential to the curved surfaces which effect changes in power extend in pairs of planes which are parallel to each other, in a manner to avoid any jump in the image when the line of sight moves from one of the additional parts to the adjacent additional part.