Tdma system with discontinuous transmission
CA 2228300 C · Owner: Kahn, Colin Leon · Inventors: Turner, Michael D.; Kahn, Colin Leon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Alternative messages are transmitted in a time slot of a frame of a time division multiple access communications system during periods of silence or whenno speech data is present. When an absence of voice is detected an abbreviated, message is substituted for a longer message in the time slot. In subsequent frames the shorter message is also substituted for the longer message until voice is detected.
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
- Filed January 29, 1998 and granted September 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2020.
- 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.