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:
Jul. 16, 1991
Filed:
Dec. 13, 1989
Takahisa Shinoda, Shizuoka, JP;
Yasuaki Nakamura, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
An optical switch system including an optical switch apparatus which includes a light source emitting light of a certain wavelength, a single optical fiber cable for transmitting the light to a terminal switch, radiating means for radiating the light transmitted over the optical fiber cable, a reflector that is provided in the optical path of the radiated light at such a position that the reflected light will reach the radiating means, a shutter adapted to be inserted into or removed from the optical path of the radiated light, and a light extractor for detecting the reflected light wave that has passed through a return path in the optical fiber cable.