Telemetry interface unit
CA 2135350 A1 · Owner: Hache, Yvon · Inventors: Doucet, Yves; Standen, Chris; Gagnon, Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to improvements in automatic meter reading systems. In particular the invention relates to a telemetry interface unit (TIU) and system having an inbound and outbound calling window that does not interfere with a customer's use of their telephone line. The TIU provides an interface between a telephone line and any type of end device including but not limited to end devices such as utility meters sensors or security, devices with the appropriate interface card installed in the TIU.
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 November 8, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2016.
- 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.