Communications system and method
CA 2275282 C · Owner: Newman, James · Inventors: Jackson, Timothy; Newman, James; Hughes, Philip Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A communications system (1) has a plurality of nodes (2). Each node (2) has a receiver (10) for receiving a signal transmitted by wireless transmitting means and a transmitter (11) for wireless transmission of a signal. Each node (2) further has means for determining if a signal received by said node (2) includes information for another node and causing a signal including said information to be transmitted by said transmitting means to another node if said signal includes information for another node. Each node (2) has a substantially unidirectional point-to-point wireless transmission link (3) to at least one other node. The communications system (1) has high spectral efficiency …
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 18, 1997 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 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.