Security and alarm system
CA 2005312 A1 · Owner: Donovan, John · Inventors: Donovan, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A security and alarm network system for separate and spaced premises or locations in which each premises or location is linked to each other premier or location by radio signal transmitting and receiving means controlled by a programmed computer adapted to be rendered active by inputting of predetermined code sensor means in each, premises or location being operatively linked to the respective microcomputer and being adapted to be activated by unauthorised intrusion, fire or other aggressive action and the activated, microcomputer being programmed to cause transmission of a radio alarm signal to the microcomputers in the other premises or locations where an audible and/or visual indication …
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 December 12, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2011.
- 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.