Radio communication system
CA 2127673 C · Owner: Matsushita Electric Industrial Co. Ltd. · Inventors: Suzuki, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valid bit generator of a base station generates a valid bit to be disposed at or near the top of a message to be transmitted, sets the valid bit to be inactive if the message can be ignored sets the valid, bit to be active if the message cannot be ignored and, transmits the message. Upon reception of this message a valid bit detector of each terminal station judges whether the valid bit added at or near the top of the received message is inactive or active. If inactive a, message analyzing process is immediately stopped whereas if active, the message is received and analyzed to the end thereof.
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 July 8, 1994 and granted February 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2016.
- 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.