Group call service with efficient transmission of voice packets on a cdma radio link
CA 2453320 A1 · Owner: Vassilovski, Dan · Inventors: Vassilovski, Dan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A one-to-many wireless telephone communication system includes a transmitting telephone that transmits voice packets in e.g. CDMA to a base station in an , IP-based infrastructure. The base station converts the CDMA packets to IP and sends them through the infrastructure to a communication manager which copies , the packets as many times as necessary for the recipient telephones in the group and sends the IP packets back through the infrastructure using the IP addresses of the recipients. The base stations receiving the IP packets transform them to voice packets and transmit the voice packets to the recipient telephones, thereby relieving the telephones from having to support IP.
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 July 12, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 2024.
- 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.