Communication system with repeatedly allocated channel id numbers
CA 2177786 C · Owner: Nawata, Hizuru · Inventors: Nawata, Hizuru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An available frequency range previously assigned to the communication system is divided into a plurality of subranges each including a plurality of frequency channels to which channel identifiers are assigned, respectively. The channel identifiers are repeatedly assigned to all the frequency channels in the subranges. In such a channel assignment a transmitting side, transmits a signal including a desired channel identifier corresponding to a desired frequency channel. At a receiving side after detecting a frequency acquisition of the demodulator the, desired channel identifier is detected based on the received signal when the frequency acquisition of the demodulator is detected. When the …
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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 May 30, 1996 and granted May 9, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 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.