Patent · US Expired

Endoscope

US4215678A · kind A · utility

31Cited by

9References

10Claims

0Family size

Assignees

Propper Manufacturing Co., Inc. · US
HEINE Optotechnik GmbH & Co. KG · DE

Inventors

Helmut A. Heine
Werner E. Erfurt · Herrsching am Ammersee, DE

Key dates

Filing date	Feb 28, 1977
Grant date	Aug 5, 1980
Priority date	—
Expiry date	Feb 28, 1997

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B1/07
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

An endoscope includes a light conducting outer tube and a light absorbing inner tube, with the inner tube being located concentric with the outer tube and being spaced a distance radially inwardly from the outer tube so as to maintain total internal reflection in the light conducting material of the outer tube.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.