Wireless remote temperature sensing thermostat with adjustable register
CA 2244012 C · Owner: Ho, Tien-Hou Joseph · Inventors: Ho, Tien-Hou Joseph; Tang, Le D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wireless remote temperature sensing and control thermostat system for regulating air ducted air conditioning systems incorporating a normal mode and a remote control mode including a combination, thermostat and radio-frequency receiver unit a radio-frequency transmitter, and an adjustable register. In the normal mode a reference temperature, is set by the thermostat for the temperature throughout the entire air-conditioned structure. In the remote control mode the local temperature, sensing and control functions of the thermostat are disabled and the transmitter unit will take over the temperature sensing at the remote site which, in turn, then will control the thermostat unit. As a …
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 July 27, 1998 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2020.
- 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.