Water supply control apparatus
CA 1269746 C · Owner: Yoshida, Takao · Inventors: Yoshida, Takao; Fujino, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A water supply control apparatus includes a flushing device to be supplied with water a water supply, valve for controlling the supply of water to the flushing device, a driving signal generator for selectively generating driving signals of first and second periods respectively, a sensor responsive to one at a time, of the, driving signals for detecting whether there is a user of the flushing device at one of the first and second periods to produce a sensor signal selectively including a user-present signal and a user-absent signal of said one period, and a control circuit responsive to the sensor signal for controlling the water supply valve. The control circuit includes a first control …
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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
- Granted May 29, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 2007.
- 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.