Alarm installation
CA 2111226 A1 · Owner: Ruus, Jan · Inventors: Ruus, Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An alarm installation comprises a central alarm station (9) and a number of alarm units (1). The alarm units can send messages to the central alarm station (9) and the central alarm station (9) can send voice messages or recorded spoken messages to a number of alert units. All sending operations are performed on the public telephone network. The central alarm station (9) may have a receipt of played-off messages by means of some simple sending method as by operating the dialling table of a receiving telephone. The alarm units (1) contain at least one detector (29-35) for an emergency situation and will at the activation of such a detector directly or immediately send a message thereof …
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 June 12, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 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.