An alarm system for use on a bus
CA 2238249 C · Owner: Child Check-Mate System Inc. · Inventors: Lowe, Allan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a new and useful alarm system for use on a school bus having an ignition switch, a master switch, a rear door switch the alarm system comprises a plurality of electromechanical circuits arranged so as to effect a resting state in which the system is inoperable, a stand-by state activated by actuating the ignition switch a latching state from, which the system may be armed an armed state in which the system is operable alarm means, to indicate an alarm state and a disarmed state in which the system is deactivated. There is also provided deactivation means positioned at a rear of the bus to deactivate the alarm system while in the armed state or the alarm state wherein the …
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
- Filed May 22, 1998 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 2020.
- 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.