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Expired Canadian patentCanada

Analog accumulator memory device

CA 1066420 A · Owner: Matsushita Electric Industrial Co. Ltd. · Inventors: Minami, Shunji

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Abstract From the Canadian patent

TITLE OF THE INVENTION:, Analog Accumulator Memory Device ABSTRACT OF THE DISCLOSURE:, Disclosed is an analog accumulator memory device of the type including a first and a second analog voltage memory devices each capable of holding an output voltage equal in magnitude to an input voltage. An output terminal of an inverter with a unit gain and an external input terminal are connected to an inverting input terminal and a noninverting input terminal, respectively, of a differential amplifier with a unit gain, the output terminal of which is connected to an input terminal of the first analog voltage memory device whose output terminal is connected to an input terminal of the second analog …

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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 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 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—
GrantedNovember 13, 1979
Term endedNovember 13, 1996
Patent numberCA 1066420 A
Classification (IPC)G06G7/14 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedNov 13, 1979Term endedNov 13, 1996

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