Smoke detector with automatic dialing
CA 2061508 C · Owner: Gilbert, Raymond · Inventors: Gilbert, Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A smoke detector casing of conventional size and adapted to be secured in any room of a residence or the like contains not only a smoke detector, an audible alarm and their circuit with a 9 volts alkaline battery as a power supply, but also a microprocessor and an automatic telephone dialer and a modem together, with a telephone jack for connecting the circuit to a telephone line so as to immediately dial and send a smoke detection signal to a central monitoring station. The circuit of the smoke detector is also used for transmitting emergency signals, others than fire alarms. The smoke detector casing also encloses a high sensitivity, combined microphone and loud speaker to provide …
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 February 19, 1992 and granted November 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2014.
- 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.