Optical fiber switching device
CA 1101711 A · Owner: Fujitsu Limited · Inventors: Okuda, Shinya; Yakuwa, Kazuo; Ishikawa, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A magnetically operated fiber optic switch for making and breaking an optical path is known but it cannot switch from one optical path to another, as can the present invention. Disclosed is an optical switch having, for example, a pair of fixed optical fibers and a movable optical fiber. An elastic body of magnetic material guides the free end of the movable optical fiber, under the influence of an externally applied magnetic field, between ends of the fixed fibers to switch the optical path from one to the other of the fixed optical fibers.
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 May 26, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 1998.
- 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.