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Expired Canadian patentCanada

Synchronization arrangement for time multiplexed data scanning circuitry

CA 1263898 C · Owner: Gte Communication Systems Corporation · Inventors: Renner, Robert E.

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

Telecommunication switching systems are typically connected by high-speed digital data spans. These spans may commonly be T1 or T2 carriers using DS1 or DS2 data formats respectively. These systems may contain duplex digital span control units. The present synchronization arrangement is an additional duplex control circuit. This synchronization arrangement includes n time multiplexed state machine for each copy of the digital span control unit. The state machine monitors data ready signals from its own copy as well as from the other copy of the digital span control unit. Other signals indicate whether the circuit is operating in a simplex or duplex mode and which circuit is the active 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 December 12, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 12, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 23, 1987
GrantedDecember 12, 1989
Term endedDecember 12, 2006
Patent numberCA 1263898 C
Classification (IPC)H04J3/00 +2 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedOct 23, 1987Patent grantedDec 12, 1989Term endedDec 12, 2006

Sources & verification

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