Apparatus and method for providing alarm synchronization among multiple alarm devices
CA 2437531 C · Owner: Ranco Incorporated · Inventors: Tanguay, William Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for synchronizing a series of interconnected alarm devices. The alarm device detecting an alarm condition produces a signal having a distinct rising edge which is detected at each of the remaining alarm devices. A pulsed alarm signal having a fixed number of pulses is generated at each of said remaining devices in response to the rising edge. A reset signal from the alarm device detecting the alarm condition resets each of the remaining alarm devices after each number of pulses is produced so that each of said devices has a pulsed alarm signal which begins and ends at substantially the same time.
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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 January 30, 2002 and granted January 18, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2024.
- 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.