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Expired Canadian patentCanada

Level sensitive embedded array logic system

CA 1089031 A · Owner: International Business Machines Corporation · Inventors: Muehldorf, Eugen I.; Eichelberger, Edward B.; Williams, Thomas W.

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Abstract From the Canadian patent

Abstract, A generalized and modular logic system is described for all arithmetic/logical units and their associated control storage and any other arrays. The logic system is partitioned into sections formed of combinational logic networks, storage circuitry, and arrays. The storage circuitry is sequential in operation and employs clocked dc latches. Two or more synchronous, non-overlapping independent system clock trains are used to control the latches. The array is a rectangular array of storage element, M x N where, M is the number of words in the array and N is the number of bits in each word. The array may be read only, or it may be a read/write array. The array may be a programmable …

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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 November 4, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 4, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 13, 1977
GrantedNovember 4, 1980
Term endedNovember 4, 1997
Patent numberCA 1089031 A
Classification (IPC)G06F7/38 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJune 13, 1977Patent grantedNov 4, 1980Term endedNov 4, 1997

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