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• 04:55, 31 August 2021 Peter talk contribs deleted page Patent US 4039899 (content was: "{{Patent |Office=US |Number=4039899 |Title=Geometry and focus correction circuit |Inventors=Carl Battjes;Harvey Leon Golladay;Michael Lawrence Rieger;Binoy Rosario;Ken Schlotzhauer |Company=Tektronix Inc |Filing date=1976-05-03 |Grant date=1977-08-02 |Cites= }}", and the only contributor was "Peter" (talk))