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Expired Canadian patentCanada

Telecommunication system for transmitting data information by means of a digital exchange

CA 1211825 A · Owner: Telefonaktiebolaget Lm Ericsson · Inventors: Lahti, Mauritz

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

A telecommunications system for utilizing a telecommunications exchange intended for transmitting digital information between a plurality of extensions for transmitting between data terminals data information having different rates is provided. Word forming means at the extensions subdivide the data flow into words of given length buffer means store, a plurality of words before sending these out over the line which is done with the bit rate given by the transmission system for digital information, and frame forming means form frame heading words which precede the frames and have a plurality of subsequent data words. The frame heading word includes a frame locking word for synchronization on …

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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 September 23, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 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.
FiledFebruary 23, 1983
GrantedSeptember 23, 1986
Term endedSeptember 23, 2003
Patent numberCA 1211825 A
Classification (IPC)H04Q3/42 +1 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedFeb 23, 1983Patent grantedSep 23, 1986Term endedSep 23, 2003

Sources & verification

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