Digital filter
CA 1266514 C · Owner: Sony Corporation · Inventors: Yamazaki, Takao; Iwase, Seiichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital filter has an input terminal provided with an input digital signal. A delay circuit connected to the input terminal produces a plurality of delayed digital signals each having a different delay time with respect to the input digital signal. A first circuit adds the input digital signal and/or the plurality of delayed digital signals to one or more digital coefficient signals of the same value so as to produce one or more added digital signals. A multiplying circuit multiplies the one or more respective digital coefficient signals by the one or more added digital signals and/or one or more of the plurality of delayed digital signals to produce a plurality of multiplied digital …
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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 March 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 2007.
- 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.