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Expired Canadian patentCanada

Control system for vehicles

CA 1053786 A · Owner: General Signal Corporation · Inventors: Auer, John H. (Jr.)

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Control System for Vehicles, Abstract of the Disclosure A vehicle control system monitors vehicle passage at predetermined locations. Each time a vehicle passes a predetermined location a window is created for passage of that vehicle at the next predetermined location. So long as the vehicle actually passes the next location during the window the vehicle is allowed to continue its travel. As a further check each location ensures that safe separation is maintained between vehicles by allowing continued travel only if a minimum time separation is maintained. The system also responds to coupled vehicles by detecting that the time separation is below a predetermined value indicative of coupled …

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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

  • Granted May 1, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMay 1, 1979
Term endedMay 1, 1996
Patent numberCA 1053786 A
Classification (IPC)B61L3/08 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedMay 1, 1979Term endedMay 1, 1996

Sources & verification

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