Device and process for transmitting information in a radiating waveguide system
CA 2197110 C · Owner: Duhot, Denis · Inventors: Rioult, Jean; Heddebaut, Marc; Duhot, Denis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
his invention relates to a device and process for transmitting information in a radiating waveguide system (2) along which a mobile element moves. The transmission device is characterized by: - a means of injecting an unmodulated carrier wave into the said radiating waveguide; - a means of taking spot samples (3,4) along the said radiating waveguide (2) of part of the energy of the said unmodulated carrier wave; - a means of modulating (7,8) the said unmodulated carrier wave using a local modulation signal in which is encoded the information intended for the said mobile element; and - a means (5) of beaming the said modulated carrier wave to the said mobile element.
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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 February 7, 1997 and granted August 5, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 7, 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.
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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.