Voice canceler with simulated stereo output
CA 2117545 C · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Nomura, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vocal canceler receives left- and right-channel input signals, and combines their non-vocal components into a single monaural karaoke signal. It then shifts the monaural karaoke signal by one phase angle to produce a left-channel output signal, and by another phase angle to produce a right-channel output signal, providing a simulated stereo effect.
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 August 23, 1994 and granted March 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 23, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2016.
- 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.