Anti-theft device
CA 1104230 A · Owner: Cardwell, John A. · Inventors: Cardwell, John A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A theft prevention device for vehicles adapted to permit a vehicle engine to be kept running when the ignition key is switched off and removed. The device includes a relay and momentary switch means, and the circuit is activated by engaging the emergency brake and depressing and releasing the momentary switch. Normal running operation is restored by inserting the ignition key and turning to the on position.
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
- Granted June 30, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 1998.
- 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.