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:
Aug. 11, 1981
Filed:
Mar. 30, 1979
Applicant:
Inventor:
Josef Reiner, Cologne, DE;
Assignee:
Herbert Schwind GmbH & Co. KG, Aschaffenburg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
351 30 ; 351 29 ;
Abstract
Method and apparatus for determining eye refraction using corrective lenses comprising projecting the corrective lens by means of an optical system into the pupil of the eye or in a predetermined spaced relation in front of said pupil, e.g., via a splitting mirror; this permits sight testing without the use of test spectacles and impairment of field of vision.