Communication circuit fault detector
CA 2017579 C · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Yamada, Yoshiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A communication circuit fault detector tests a communication circuit by using a sequence generator to generate a test signal, a memory circuit to temporarily store the test signal, and a multiplexer to multiplex the test signal and an input data signal into the communication circuit. A timing generator drives the communication circuit at a rate higher than the normal communication rate enabling the data signal and test signal to be sent through the communication circuit simultaneously. A demultiplexer demultiplexes the output signal from the communication circuit into an output data signal and a returned test signal. A comparator compares the returned test signal with the test signal stored …
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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 25, 1990 and granted May 12, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 2012.
- 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.