System and method for antenna failure detection
CA 2333763 C · Owner: Brunius, Robert E. · Inventors: Brunius, Robert E.; Charais, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a wireless security system, the system controller includes one or more antennas for reception of signals from remote sensor-transmitter units. To detect antenna failure, the system controller generates a test signal with a known parameter and transmits this test signal via a first antenna. The system controller then measures the parameter of the corresponding test signal received, if any, via a second antenna and compares the parameter of the , corresponding test signal received to a predetermined threshold parameter. When the parameter of the test signal received via the second antenna differs from the threshold by a predetermined amount or predetermined margin for , error, an …
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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 June 2, 1999 and granted April 5, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 2, 2021.
- 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.