Radio communication system and method for multicast communication
CA 2382595 A1 · Owner: Aramaki, Takashi · Inventors: Aramaki, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
When an IGMP control message is included in a variable length packet having an address for performing one to one or one to multiple communication with mobile station units (106-1 to 106-3) at a base station unit (102) the IGMP control , message is mapped to a short packet having a fixed length shorter than that of a fixed length packet used for communication with the mobile station units (106-1 to 106-3), and the variable length packet is mapped to a fixed length packet. The fixed length packet and the short packet are then transmitted as a frame signal. At the mobile station units (106-1 to 106-3) the frame signal is decomposed to take out the variable length packet and the short …
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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 June 25, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2023.
- 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.