Reduced power line driver
CA 2278909 A1 · Owner: Tremblay, Francois · Inventors: Tremblay, Francois; Bisson, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telephone line feed circuit for use with a telecommunication line comprises , a, transformer having a primary and secondary winding wound with low resistance conductors; the primary for direct connection to a tip terminal and a ring terminal of said, telecommunication line; and a driver circuit having an output connected to the transformer secondary winding for driving the transformer secondary winding directly, with substantially no resistance therebetween while yet maintaining an , impedance match between the telecommunications line and the telephone line feed circuit.
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 July 26, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 2021.
- 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.