Digital signal processing system
CA 1279393 C · Owner: Mitel Corporation · Inventors: Stroobach, Jerry; Milton, A. David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital signal processing system for use as a digital service unit within a communication switching system, comprised of a plurality of digital signal processing (DSP) modules for connection via a dedicated programmable digital switch forming part of a circuit switch matrix, to one or more input/output ports such as line circuits, trunk circuits etc. under control of a main system controller such as a, microprocessor. Applications programs for implementing predetermined service features are, downloaded from the main controller via the circuit switch matrix and digital switch, to one or more of the digital signal processing modules for storage within internal memories thereof. The main …
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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 January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 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.
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.