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Expired Canadian patentCanada

Data access circuit for a memory array

CA 1087740 A · Owner: Western Electric Company, Incorporated · Inventors: Buzzard, Clair A.; Gifford, Richard C.; Lescinsky, Frank W.

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 of the Disclosure, A memory array having a plurality of intersecting, rows and columns stores digitized speech. Each row and, column intersection consists of a binary storage cell for storing one bit of digitized speech. Incoming digitized speech is loaded into columns of the memory array in a plurality of repetitive loading sequences each loading, sequence including; reading out the bits stored in successive rows of binary storage cells, replacing in each successive row of bits, a predetermined one of the bits in the read out row with a successive one of the bits of the digitized speech and writing each read out row of bits including the replaced bit back into the row. Multibit …

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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 October 14, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 14, 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 24, 1977
GrantedOctober 14, 1980
Term endedOctober 14, 1997
Patent numberCA 1087740 A
Classification (IPC)G11C29/00 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJune 24, 1977Patent grantedOct 14, 1980Term endedOct 14, 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.