Apparatus for providing error correction data in a digital data transfer system
CA 2229720 A1 · Owner: Twitchell, Edwin R. · Inventors: Seccia, Joseph L.; Mizwicki, Paul H.; Twitchell, Edwin R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for providing error correction data in a digital data transfer system which, receives a clock signal to provide a first signal. Information data is received and a second signal is provided using the information data, which is received in groups each having a first predetermined number of elements. A plurality of .alpha.ROMs provide Galois Field multiples in look-up tables that, are addressed using the first signal to provide a first address component and using the second signal to provide a second address component. The error correction data is in groups each having a second predetermined number of elements. A RAM is accessible by a Trellis encoder and has an array for holding …
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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 February 17, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2020.
- 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.