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:
Sep. 25, 1990
Filed:
Nov. 09, 1988
Makoto Saruta, Hiratsuka, JP;
Tatsuhiro Suzuki, Yokohama, JP;
NCR Corporation, Dayton, OH (US);
Abstract
An optical wireless communications system includes a plurality of terminals each having a transmitter which transmits optical signals on a first carrier frequency and a receiver which receives optical signals on a second carrier frequency, and a plurality of optical repeaters each having a plurality of transmitters, a plurality of receivers and an optical signal destination determining structure, the optical repeaters being coupled to communicate with each other and with the terminals wherein each of the optical repeaters converts the carrier frequency of the received optical signals from one frequency to another frequency and transmits the latter frequency signals to all the terminals and to all the optical repeaters except the transmitting optical repeater of the latter frequency signals.