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Expired Canadian patentCanada

Digital communication system

CA 1205883 A · Owner: Dahod, Ashraf M. · Inventors: Dahod, Ashraf M.

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 multiple access digital communication system having fixed or variable length messages each separated into message groups each group having messages numbered from 0 to N and in which there can optimally accommodated, on the same network a combination of both high and low duty cycle subscribers having short or long messages. The apparatus of the system includes a signal communication link comprising a two-way bus or two one-way buses, a plurality of subscriber devices a plurality, of network interface units respective ones of which couples each subscriber device to both the communication link. One of the network interface units at any one point in time is a pacer unit which sends a control …

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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 June 10, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 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.
FiledJuly 19, 1983
GrantedJune 10, 1986
Term endedJune 10, 2003
Patent numberCA 1205883 A
Classification (IPC)H04L7/00 +1 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedJuly 19, 1983Patent grantedJune 10, 1986Term endedJune 10, 2003

Sources & verification

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