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• 07:17, 31 August 2021 Peter talk contribs deleted page Patent US 4146844 (content was: "{{Patent |Office=US |Number=4146844 |Title=Feed-forward amplifier |Inventors=Pat Quinn |Company=Tektronix Inc |Filing date=1977-10-31 |Grant date=1979-03-27 |Cites=Patent US 3944944A;Patent US 3689752A }}", and the only contributor was "Peter" (talk))