Room temperature sensor and thermostat control device
CA 2203476 C · Owner: Charles, Donald E. · Inventors: Charles, Donald E.; Wojtowicz, Christopher; Wolfinger, Kenneth F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermostat control having improved user controls wherein an analog version contains a binary coded switch for selectively setting a setpointtemperature. The binary coded switch is configured to have discrete positions corresponding to a plurality of setpoint temperature settings. It contains among, other things, a resistor network configured to produce a setpoint signal indicative of the binary coded switch position and a setpoint adjust switch for setting thebinary coded switch position. Also digital version having a man-machine, interface port wherein point information from a controller can be viewed and modified with the thermostat control device controls when a hardware passkey is …
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 April 23, 1997 and granted January 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2019.
- 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.