Noise sensitive, photoelectric transceiver including a digital stability indicator
CA 2097098 C · Owner: Bondarev, Vadim · Inventors: Juds, Scott M.; Bondarev, Vadim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a photoelectric transceiver (10) for detecting the presence and absence of objects (16) in a selected region (12). The transceiver (10) includes a light source (18), a light sensor (22) and electronic circuitry (13). The transceiver (10) generates a timing signal (MDCLK) that synchronizes its operation. In synchrony with the timing signal the transceiver emits pulses of light (14) into the selected region (12) and senses light (24) coming from the selected region. When an object (16) is present in the selected region (12) the emitted light pulses (14) are, reflected back to the transceiver (20). Based upon the light sensed the, transceiver generates an output (OUTOD) …
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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 May 27, 1993 and granted May 4, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2015.
- 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.