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Expired Canadian patentCanada

Network communications adapter

CA 1289673 C · Owner: Roiger, Wayne R. · Inventors: Peterson, Wayne A.; Roiger, Wayne R.; Humphrey, Donald J.

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 network communications adapter for interconnecting a plurality of digital computing resources for mutual data exchange in which a high performance, large capacity common memory is provided with a pair of external buses which allows multiple processors to store information in and read information from the common memory. The common memory is configured into two banks each bank operating independently and concurrently under control of bus switching logic with separate address control and data, buses. The common memory typically provided 400 megabits per second of bandwidth to the multiple attached thirty-two and sixteen bit processors which may be coupled either to both buses simultaneously …

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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 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 13, 1987
GrantedSeptember 24, 1991
Term endedSeptember 24, 2008
Patent numberCA 1289673 C
Classification (IPC)G06F15/16 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedAug 13, 1987Patent grantedSep 24, 1991Term endedSep 24, 2008

Sources & verification

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