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Expired Canadian patentCanada

Bit switching of word synchronized data

CA 1089962 A · Owner: L M Ericsson Pty. Ltd. · Inventors: Herschtal, Ludwik

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

The invention relates to a digital data switch for serially bit-switching word synchronized Pulse Code Modulated (PCM) data from inlets to outlets of the switch. The switch is particularly intended for use in situations wherein PCM data words arriving at the switch on different inlets are not aligned in so far as word boundaries are concerned. The PCM data is bi-polar or diphase modulated and the synchronization information of each word consists of a violation of the modulation. The switch includes a demodulator on each inlet for demodulating the data and a synchronization detect circuit associated with each demodulator for detecting the synchronization information in each incoming data …

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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 November 18, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 18, 1997.
  • 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 15, 1977
GrantedNovember 18, 1980
Term endedNovember 18, 1997
Patent numberCA 1089962 A
Classification (IPC)H04Q11/04 +1 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedSep 15, 1977Patent grantedNov 18, 1980Term endedNov 18, 1997

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