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Expired Canadian patentCanada

Method and devices for transmitting two heterochronous binary signals simultaneously over the same medium

CA 2106118 C · Owner: Roudot, Francois · Inventors: Guerin, Jean-Pierre; Robin, Jean-Francois; Roudot, Francois

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Abstract From the Canadian patent

Process and devices for the simultaneous transmission of two heterochronous binary signals by the same medium. The invention concerns a process and devices for the simultaneous transmission of two heterochronous binary signals (A B) as a single signal (1) via a single transmission medium. Provision is made to insert between the binary level change transitions of the first (A) of the two input binary signals a brief polarity inversion for each of the pulses of the second input signal (B) which correspond to the same one among the two possible binary levels for that second signal each inversion due to the second signal being positioned above a guard area extending both sides of the binary …

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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 September 14, 1993 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2013.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2015.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 14, 1993
GrantedSeptember 22, 1998
Term endedSeptember 14, 2013
Patent numberCA 2106118 C
Classification (IPC)H04J3/00 +2 more

Timeline

Timeline From CIPO dates

1994199619982000200220042006200820102012Application filedSep 14, 1993Patent grantedSep 22, 1998Term endedSep 14, 2013

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.