A headphone
CA 2460658 A1 · Owner: Cork, Peter · Inventors: Cork, Peter; Cornforth, John Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A receiver assembly comprising a housing receiver unit, and having left and , right audio stereo output lines which connect to a connection for connection to a headphone each of left and right lines having a impedance in series and also having a capacitance connecting the left and right audio lines said capacitance being located at a point between the connector and non output side of the inductance and wherein the receiver unit and audio lines are connected via an inductance.
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 September 17, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 17, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2024.
- 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.