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Expired Canadian patentCanada

Dynamic mos memory with reduced propagation delay

CA 1088669 A · Owner: Data General Corporation · Inventors: Carberry, Richard A.

CIPO record

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Abstract From the Canadian patent

The present invention relates to an improved MOS memory structure. There is disclosed an array of memory cells of the three-device-per-bit type the array being, formed in rows and columns. Temporary storage cells are disclosed which are employed to receive and temporarily store inverted digital information from selected memory cells responsive to a READ signal. The inverted digital information is re-inverted upon restoration thereof into the selected memory cells, thus eliminating any need of accounting for the polarity or status of the data whereby, propagation delay time through the memory structure is reduced.

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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 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 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.
FiledJanuary 26, 1977
GrantedOctober 28, 1980
Term endedOctober 28, 1997
Patent numberCA 1088669 A
Classification (IPC)G11C11/40 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJan 26, 1977Patent grantedOct 28, 1980Term endedOct 28, 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.