Backplane optical spine
CA 2102856 C · Owner: American Telephone And Telegraph Company · Inventors: Bowen, F. Wayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optical spine backplane apparatus for interconnecting circuit cards. The apparatus comprises a central spine structure formed of a bundle of optical fibers extending between circular collars each positioned along the spine and formed around the optical fiber bundle to form a shelf for mounting circuit cards. Each circular collar has an optics pad consisting of optical transmitters and receivers coupled with ones of the optical fibers and with signal leads connected to a first coupling or crosspoint matrix array. A circular collar is constructed of a bundle of electrical conductors formed around the outside of the central spine with each electric conductor coupled to the first coupling or …
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
- Filed November 10, 1993 and granted April 22, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2015.
- 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.