A wireless lan distributed access procedure providing priority for voice transmissions
CA 2199307 C · Owner: Sobrinho, Joao Luis · Inventors: Sobrinho, Joao Luis; Krishnakumar, Anjur Sundaresan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A facility having particular data to transmit over a transmission medium contends for access to the medium by transmitting a jamming signal over the transmission medium for a particular duration of time that is a small fraction of the amount of time that the facility had to thus far wait to so contend. If the transmission medium is found to be idle at the expiration of that time then thefacility accesses the medium. Otherwise the facility waits until the, transmission medium again becomes idle and then re-contends for access.
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 March 6, 1997 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2019.
- 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.