High speed cyclic redundancy check algorithm
CA 2204450 C · Owner: Pmc-Sierra Inc. · Inventors: Dabecki, Stephen Julien; Fahmi, Maher Nihad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of determining an error detection code (EDC) on incoming data which includes a reserved bit field, comprising applying the incoming data to inputs of both an input data CRC (IDC) calculator and to an input data and reserved field CRC (IDRC) calculator calculating the EDC on successive input data words and recursively updating the EDC in both the IDC and IDRC calculators, selecting a payload of the input data as a system output signal for all payload words and, subsequently selecting a output EDC word from the IDRC calculator in a time immediately following a final payload word which contains the reserved field.
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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 5, 1997 and granted November 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2019.
- 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.