Alarm system using local data channel
CA 2260680 C · Owner: Tyco Safety Products Canada Ltd./Produits De Securite Tyco Canada Ltee. · Inventors: Parker, James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The alarm system has an alarm unit for ready access at a point of entryway which communicates with a line seize module located in a secure location. The alarm unit has a transmitter receiver a control panel function, a key pad, and an input/output port for connection to telephone wiring for communicating with the line seize unit. The line seize module includes its own input/output communication port connected to the wiring of the local telephone line and as such is in direct communication with the alarm unit. Communication is separate and distinct from normal telephone communication and preferrably is at a high frequency above the audible range. This allows the alarm system to communicate …
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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
- Filed February 2, 1999 and granted March 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 2021.
- 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.