Apparatus and method for binary data transmission
CA 2004827 A1 · Owner: Systran Corporation · Inventors: Dingeman, Drake D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus and method for encoding data in an AC coupled bi-polar data transmission system. A stream of binary data is encoded to produce first and second binary code signals for transmission on a pair of transmission lines. Except as provided by the encoding technique both, binary code signals undergo a change of state for each data bit time. The signal on one line undergoes a transition for each bit time except when the data signal is changing from zero to one. The other transmission line undergoes a change of state for each bit time except when the data signal changes from one to zero. Decoding of the transmitted signals is achieved by applying both signals to an exclusive OR gate.
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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 7, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 7, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2011.
- 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.