Digital sound system for motion pictures with analog sound track emulation
CA 2116025 A1 · Owner: Beard, Terry D. · Inventors: Beard, Terry D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A signal conditioner (116) is provided for the output of a digital sound source (110) in a dual digital/analog motion picture theater sound system so that the digitally derived audio signal emulates the analog sound track (58) signal. This allows the digitial source to be easily integrated into the overall sound system without displacing the existing analog sound track system. The theater sound playback mechanism (124) is provided with the conditioned audio signal when the digital sound source is actuated and, receives the analog sound track signal at other times. The conditioning circuit includes an adjustable impedance (P1 P2) to match, the current from the digital sound source to the …
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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 September 30, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 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.