Pseudorandom binary sequence block shifter
CA 2270827 C · Owner: Nortel Networks Corporation · Inventors: Carleton, Gregory
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for determining the state at any time in the past, relative to a present state of a linear feedback shift register comprises determining a an, inverse transition matrix which if multiplied by the current state in modulo- 2 arithmetic, yields the state one step into the past; and multiplying in modulo-2 arithmetic the, present state of the linear feedback shift register by the inverse transition matrix N times, to obtain the state N steps into the past.
Read the whole patent
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, 1999 and granted April 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2021.
- 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.