Voice data discriminator
CA 1290868 C · Owner: Unitel Communications Inc. · Inventors: Colbourn, Robert W.; Chiu, Robert S.K.; Cecarelli, Maurizio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
ABSTRACT, The device filters a signal in a telecommunications link into a voice frequency signal and a data frequency signal and compares samples of the magnitude of each to provide an indication of whether the sample is a voice sample a data, sample, or neither a voice nor a data sample. The device tracks the relative number of voice and data samples and based on this, enters a voice or a data mode. When in voice mode the device, times the duration of voice on the telecommunications link and optionally, may take down the communication link if the voice excedds a predetermined maximum duration.
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 October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 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.