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Expired Canadian patentCanada

Arrangement for correcting pulse distortion in homochronous data transmission

CA 1181150 A · Owner: Philips Electronics N.V. · Inventors: Kalfs, Johannes J.W.; Snijders, Wilfred A.M.; Van Gerwen, Petrus J.

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Abstract From the Canadian patent

Arrangement for correcting pulse distortion in homochronous data transmission". In the duplex transmission of data signals over two-wire transmission paths the phenomenon of echo-signals is encountered, while simultaneously intersymbol interference occurs between the data symbols themselves. In order to reduce the influence of both the echo signals and the intersymbol interference, the arrangement comprises a random access memory (16) which produces a correction value(c(i)) at each sampling instant to correct the received data signal. The memory is addressed from registers (13, 14) and a counter (15), the contents of the registers being determined by the data symbols transmitted last and …

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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 January 15, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 4, 1982
GrantedJanuary 15, 1985
Term endedJanuary 15, 2002
Patent numberCA 1181150 A
Classification (IPC)H04B15/00 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedFeb 4, 1982Patent grantedJan 15, 1985Term endedJan 15, 2002

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