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Expired Canadian patentCanada

Signal transmission system

CA 1204823 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Bryant, Stewart F.

CIPO record

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

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Abstract From the Canadian patent

11, ABSTRACT:, A signal transmission system comprises a transmitter a receiver and a transmission link in which the signal to be transmitted is pulse code modulated. The transmission link comprises a plurality of channels (0-7) one for, each bit of the pulse code modulated signal. The quality of each channel is monitored and the bits of the pulse code modulated signal are applied to the channels such that the most significant bits of the pulse code modulated signal are allocated to the channels having the lowest level of interfering signal.

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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 May 20, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 25, 1982
GrantedMay 20, 1986
Term endedMay 20, 2003
Patent numberCA 1204823 A
Classification (IPC)H04B7/24 +2 more

Timeline

Timeline From CIPO dates

1983198619891992199519982001Application filedNov 25, 1982Patent grantedMay 20, 1986Term endedMay 20, 2003

Sources & verification

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