Wireless communications systems with self threshold setting
CA 2194022 C · Owner: Feng, Kai Di · Inventors: Feng, Kai Di
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An infrared communication system is provided which includes a photodetector for detecting infrared signals from an infrared transmitter source and converting the infrared signals to electrical signals, a first delay device having a input coupled to the photodetector for delaying the signal from the photodetector for a predetermined period of time related to the rise time of an expected electrical signal from photodetector a voltage divider having an, input coupled to the photodetector for reducing the amplitude of the signal from the photodetector, a second delay device having an input coupled to the output of the voltage divider for delaying the reduced signal from the photodetector for a …
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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
- Filed December 24, 1996 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 24, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 2018.
- 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.