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Expired Canadian patentCanada

Music translation device

CA 1282589 C · Owner: Forrest, David M. · Inventors: Forrest, David M.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A music translation device provides a light output pattern in response to an audio input. A divider circuit is used to provide a repeating output which commutates repeatedly among a series of output lines. Each output line is connected to a pair of output devices. The output pairs are arranged along a pair of paths, the output devices being oriented along the lines in an opposed order to create the illusion of oppositely directed motion along the paths.

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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 April 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 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.
FiledJune 28, 1988
GrantedApril 9, 1991
Term endedApril 9, 2008
Patent numberCA 1282589 C
Classification (IPC)A63J17/00

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedJune 28, 1988Patent grantedApril 9, 1991Term endedApril 9, 2008

Sources & verification

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