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Expired Canadian patentCanada

Associative storage circuit

CA 1046639 A · Owner: Siemens Aktiengesellschaft · Inventors: Horninger, Karlheinrich

CIPO record

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Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstrate, An associative storage circuit characterized in that a storage cell therefor includes two circuit arms in parallel each arm having one MNOS, storage transistor and one switching transistor connected in series and that, the information which is to be written in and the comparison information, during readout may be applied to the gates of the switching transistors the, storage transistors in one embodiment having a common gate line; in a second embodiment having individual gate controls for bit-by-bit write-in of information; and in a third embodiment, having a common gate line and a common substrate terminal line with bit-by-bit write-in by means of opposite polarity write-in …

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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 16, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 16, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJanuary 16, 1979
Term endedJanuary 16, 1996
Patent numberCA 1046639 A
Classification (IPC)G11C11/40 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJan 16, 1979Term endedJan 16, 1996

Sources & verification

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