Recording/reproducing method and device for an automatic performing piano
CA 2072204 C · Owner: Kondo, Tetsusai · Inventors: Kondo, Tetsusai
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A recording/reproducing method and device for an automatic performing piano which not only seizes performance information according to occurrence and timing of an onevent, but also converts the performance information according to actual emission timing in each respective recording and reproducing process steps thereby achieving, accurate performance reproduction with balance and high fidelity. Since a time lag between depression of key and emission of sound varies with the intensity in depressing of the keys, this time lag is incorporated into performance information to be stored, a key drive solenoid can be actuated or terminated in immediate response to the output of key depression or …
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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 June 24, 1992 and granted March 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 2014.
- 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.