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Expired Canadian patentCanada

Method to efficiently reduce the number of connections in a circuit

CA 1298666 C · Owner: International Business Machines Corporation · Inventors: Trevillyan, Louise H.; Berman, Charles L.

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

Abstract A provided logic circuitry implementation in a given technology includes n signals and m nodes. A final logic circuitry implementation is produced therefrom which is the functional equivalent of, and contains fewer connections than, the provided logic circuitry implementation. A given one of the n signals is first processed, and global information is computed for this signal. A graphical representation of connections between the m nodes is derived from the computed global information. A list of nodes that form a cut set is produced from the graphical representation and an, optimized logic circuitry implementation is provided as a function thereof. Each of the remaining ones of the …

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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 April 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 7, 2009.
  • 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 4, 1988
GrantedApril 7, 1992
Term endedApril 7, 2009
Patent numberCA 1298666 C
Classification (IPC)G06F15/00 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedFeb 4, 1988Patent grantedApril 7, 1992Term endedApril 7, 2009

Sources & verification

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