Method and circuit for testing transmission paths
CA 2057447 C · Owner: Goatcher, John Kenneth · Inventors: Goatcher, John Kenneth; Gauthier, John Albert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A circuit for testing the integrity of transmission paths includes a first linear feedback shift register (LFSR) adapted to generate a periodic sequence of pseudo random test data for transmission on the transmission paths. A second LFSR synchronizes to the transmitted test data after being provided with a seed value corresponding to a transmitted data word. After synchronization, the second LFSR is set to a free running mode and independently generates a pseudo random sequence of patterns corresponding to the sequence generated by the first LFSR. A comparator compares the pseudo random data generated by the second LFSR with the pseudo random data received from the transmission paths. If 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 11, 1991 and granted December 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2013.
- 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
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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.