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Expired Canadian patentCanada

Memory array

CA 1094224 A · Owner: Western Electric Company, Incorporated · Inventors: Lescinsky, Frank W.; Zachok, Robert M.; Buzzard, Clair A.

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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 of the Disclosure The present invention relates to a memory array. The array is comprised of a plurality of intersecting rows and columns with each row and column including a plurality of binary storage cells. Each cell stores one binary bit. A unit is provided for checking the parity of the bits in each row of the memory array. A unit is also provided which is responsive to the checking unit for indicating a malfunction in the memory array. A counter is provided for counting the number of rows in which parity errors occur. Finally, a unit is provided for normally disabling the indicating unit and for enabling the indicating unit at the time the number of rows containing parity …

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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 January 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 20, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 10, 1980
GrantedJanuary 20, 1981
Term endedJanuary 20, 1998
Patent numberCA 1094224 A
Classification (IPC)G11C29/00 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Application filedApril 10, 1980Patent grantedJan 20, 1981Term endedJan 20, 1998

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