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    Patent Citations (2)

      Publication numberPublication dateAssigneeTitle
      JP-S495371-AJanuary 18, 1974
      US-3432650-AMarch 11, 1969Northern Electric CoSignal multiplier providing an output signal substantially free of components proportional to the individual input signals

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    Cited By (2)

      Publication numberPublication dateAssigneeTitle
      JP-S5760714-AApril 12, 1982Toshiba CorpAdjusting device for frequency characteristic
      JP-S62190986-UDecember 04, 1987