Method and apparatus for identifying a transmitter in a simulcast radio communication system
CA 2208869 C · Owner: Goldberg, Steven Jeffrey · Inventors: Goldberg, Steven Jeffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus identifies communication cells in a simulcast radio communication system comprising the cells and a portable communication unit (PCU). Identification bit patterns are assigned to the cells in a manner such that when, transmissions of the identification bit patterns are received simultaneously from cells, adjacent to one another, thereby producing a received interference bit pattern, identities of the cells received can be resolved to a subset of the cells by analysis of, the received interference bit pattern wherein the subset is inclusive of the cells, received.
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 December 27, 1994 and granted September 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 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.