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:
Dec. 22, 1981
Filed:
Mar. 26, 1980
Applicant:
Inventors:
Helmut A Heine, Herrsching, DE;
Werner E Erfurt, Herrsching, DE;
Irving A Speelman, East Williston, NY (US);
Assignees:
Propper Manufacturing Co., Inc., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
128-6 ;
Abstract
An endoscope includes a light conducting tube having an interior coating of a material having a lower index of refraction than the material of the tube so as to maintain total internal reflection in the light conducting material of the tube, the inner surface of the interior coating being prepared in such a way that unwanted light is prevented from entering the viewing passage.