A digital correlator
CA 2387697 C · Owner: Mendelovicz, Ephraim · Inventors: Mendelovicz, Ephraim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for receiving a data stream having a plurality of time domain spread spectrum messages in the same frequency channel. Each message is independent, spread spectrally with a unique code and the data stream contains a subset of all known codes. The apparatus finds a specific code and a constant phase shift between the incoming code and a reference code by serially moving the data stream through a shift register (40) subjecting all , the shift register outputs to a single expected reference code and accumulating the result for each output using a plurality of accumulators (42). The code and phase shift is indicated by the largest magnitude of the accumulation, above 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 October 18, 1999 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 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.