Method and apparatus for participating in group communication services in an existing communication system
CA 2813744 C · Owner: Qualcomm Incorporated · Inventors: Crockett, Douglas M.; Maggenti, Mark; Rosen, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A push-to-talk communication device to participate in a group communication net (100) is claimed. The group communication net (100) comprises a controller (104) to manage the group communication net (100) and interface with the push-to-talk communication devices (108 112 and 116). A processor converts information signals into packet data suitable for transmission over a distributed network. The processor may also have identification information and updates its identification information when its current identification information has or is about to change. The processor then transmits its new identification information to the controller (104). The push-to-talk devices (108 112 and 116) also …
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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
- Filed March 2, 2001 and granted May 9, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2023.
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Timeline
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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.