Security polling transponder system
CA 1057832 A · Owner: Morse Products Manufacturing · Inventors: Falck, Melvin S. (Jr.)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates generally to security systems of the type which includes a central controller connected with a number remote stations. Existing systems have a central controller for polling a number of remote transponders connected to the controller by telephone lines, but these prior systems typically have the capability of interrogating only a single alarm condition at each transponder site. More complex systems are well within the state-of-the-art of today's digital communications technology, but a key limiting factor is cost especially, cost of the modem equipment. The present invention overcomes these deficiencies of the prior art by providing an improved transponder …
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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 July 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 3, 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.
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.