Radio data transmission system
CA 2174379 C · Owner: Otsuka, Akira · Inventors: Otsuka, Akira; Take, Keijiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A base station and a base station controller have means for providing data communication channels using a random access method (RACHs) for mobile stations. The base station or the base station controller has means for notifying channel information on an RACH. Each mobile station has means for determining whether or not a packet can be sent and means for shifting from one RACH to another based on the channel information. The base station and the base station controller further include means for transferring a packet to a mobile station over the RACH. The base station controller has terminal identifier management means and packet division and reconstruction means for transferring a packet …
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 April 17, 1996 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2018.
- 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.