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:
Jun. 23, 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 / ; A61B / ;
U.S. Cl.
CPC ...
351 30 ; 351 13 ;
Abstract
Method and apparatus for projecting or imaging optotypes so that they can be perceived in space under conditions of unimpeded vision without requiring, e.g., projection screens.