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Expired Canadian patentCanada

Reassignment of digital oscillators according to amplitude

CA 1292895 C · Owner: Gulbransen Incorporated · Inventors: Starkey, David Thomas; Williams, Anthony Glenn

CIPO record

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Abstract From the Canadian patent

A process for operating a digital synthesizer type of electronic musical instrument to rapidly make available digital oscillators to produce newly keyed notes even when all digital oscillators are currently active with previous assignments. The process contains a way of maintaining a record of the digital oscillator with lowest amplitude and reassigning this lowest amplitude digital oscillator to produce the new note on the rationale that the output of the lowest digital oscillator will be the least missed if an output has to be prematurely curtailed. Besides a straight amplitude critereon, the process also allows for prioritizing some low amplitude outputs over others to make a more …

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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

  • Granted December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 29, 1989
GrantedDecember 10, 1991
Term endedDecember 10, 2008
Patent numberCA 1292895 C
Classification (IPC)G10H1/22 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedMarch 29, 1989Patent grantedDec 10, 1991Term endedDec 10, 2008

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.