Humidity detecting circuit
CA 1287986 C · Owner: Ando, Yuzi · Inventors: Nakatani, Masato; Ando, Yuzi; Tsuda, Tatsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A humidity detecting circuit for detecting the ambient humidity, which includes a constant current source a first temperature-detecting resistor self-heated by the constant current source to detect the ambient humidity and having one terminal connected to an output terminal of the constant current source, a second temperature-detecting resistor having one terminal connected to said one terminal of the first temperature-detecting resistor to detect the ambient temperature, an operational amplifier having an inverting input terminal, a noninverting input terminal and an output terminal, said inverting input terminal being connected to the other terminal of the second temperaturedetecting …
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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 August 27, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 27, 2008.
- 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.