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Expired Canadian patentCanada

Continuous phase shift modulation system with improved spectrum control

CA 1314947 C · Owner: Paradise, Ronald Y. · Inventors: Paradise, Ronald Y.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract, A continuous phase shift modulation system wherein for each of the in-phase and quadrature components adjacent half-cosine pulses of the same polarity are joined by a continuous transition modulation signal which maintains continuity of the waveform and at least its first derivative. When this occurs, the other component signal is adjusted to maintain constant the vector sum of the component signals.

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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

  • Granted March 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 2010.
  • 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 28, 1989
GrantedMarch 23, 1993
Term endedMarch 23, 2010
Patent numberCA 1314947 C
Classification (IPC)H04L27/12 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedSep 28, 1989Patent grantedMarch 23, 1993Term endedMarch 23, 2010

Sources & verification

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