Digital telephony card for use in an operator system
CA 1307600 C · Owner: Northern Telecom Limited · Inventors: Petro, John Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for establishing a desired operator audio level in an operator position means, is disclosed comprising a processor, means for processing digital signals for generating a desired receive audio level in an operator position means for use by an operator, conversion means for converting analog speech transmit signal from a telephone transmit means to digital for input to said processor means and for converting digital receive signal from the processor means to analog receive signal for input to a telephone receive means, and means for connecting the processor means to a telecommunications network. The processor means includes control means for the operator for permitting the operator …
Read the whole patent
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 September 15, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 15, 2009.
- 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.