Optical space switch
CA 1284904 C · Owner: Murakami, Koso · Inventors: Kamoi, Jyoei; Sawaki, Ippei; Murakami, Koso
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical space switch is formed in such a manner that switch elements having two input and two outputs are arranged in an n x n matrix form and optical signals from n input highways are switched to n output highways. A characteristic feature of the present invention is that the switch elements are connected in such a manner that the optical signals are always passed the same number of switch elements, from the input highways to the output highways.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 18, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.