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Expired Canadian patentCanada

Digital transmitting system

CA 1183619 A · Owner: Nippon Electric Co. Ltd. · Inventors: Iijima, Yukihiko

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

In a digital transmitting system wherein signal information is transmitted from a transmission buffer memory device to a receiving buffer memory device through a transmission line extending therebetween there are, provided a counter for producing count information proportional to a sum of information transmission delay times in the transmission and receiving buffer memory devices, and a read control circuit which controls the read-out time of the information from the receiving buffer memory device such that a count of the counter coincides with a predetermined reference value, thereby rendering a sum of the information transmission delay times coincident with a predetermined time.

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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 March 5, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 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.
FiledOctober 4, 1982
GrantedMarch 5, 1985
Term endedMarch 5, 2002
Patent numberCA 1183619 A
Classification (IPC)H04J3/02 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedOct 4, 1982Patent grantedMarch 5, 1985Term endedMarch 5, 2002

Sources & verification

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