Predictive collision avoidance method and apparatus for wireless communications
CA 2103135 C · Owner: Ibm Canada Limited-Ibm Canada Limitee · Inventors: Hartley, Lee F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed for reducing collision of message packets sent by a station in a wireless communication medium used by at least two stations for communication. The method includes permitting access to the medium by each station requiring use of the medium immediately if the medium has been inactive longer than one predetermined delay amount of time and imposing a length of delay in permitting access to the medium by each of said stations if the medium is in use.
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 15, 1993 and granted May 11, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2015.
- 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.