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Expired Canadian patentCanada

Symbiotic system for testing electromagnetic signal coverage in areas near transport routes

CA 2539292 C · Owner: Schenken, Christopher T. · Inventors: Horton, Mark; Schenken, Christopher T.

CIPO record

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Abstract From the Canadian patent

A cooperative system (10) for testing signal strength near a target area (70) selected by a wireless provider (150) is disclosed using test units (80) , installed in the selected fleet vehicles of an unrelated service enterprise (30). The system in one embodiment includes an algorithm for comparing test parameters (90) to the route data contained in a dispatch plan (60) for the fleet vehicles (26), in order to identify the optimal routes on which to send test units. A computer software product for storing the parameters and executing the algorithms is also disclosed. Signal testing in a target area (70) is accomplished through the symbiotic relationship between the testing units …

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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 September 22, 2004 and granted November 29, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 22, 2004
GrantedNovember 29, 2016
Term endedSeptember 22, 2024
Patent numberCA 2539292 C
Classification (IPC)H04W24/08

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedSep 22, 2004Patent grantedNov 29, 2016Term endedSep 22, 2024

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.