Improvements in and relating to data transmission
CA 2325612 A1 · Owner: Samuel, Louis Gwyn · Inventors: Samaras, Konstantinos; Samuel, Louis Gwyn; Yan, Ran-Hong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mobile telephone network operating general packet radio service includes a base, station (2) and a group of mobile telephones (M1 to M8). The base station (2) includes a control unit which generates a succession of data, packets which are transmitted along a common downlink to all the mobiles (M1 to M8). Each data packet includes a header section containing an uplink state flag identifying a first selected mobile, to poll that mobile and cause it to return a packet of data, to the base station along a common downlink channel. The header also includes an uplink, state flag identifying a second selected mobile and is accompanied by the identity of and, time slot for a second auxiliary …
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 November 9, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 9, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2022.
- 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.