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• 05:45, 21 March 2024 Peter talk contribs created page Patent US 4188563A (Created page with "{{Patent |Office=US |Number=4188563A |Title=Cathode ray tube having an electron lens system including a meshless scan expansion post deflection acceleration lens |Company=Tektronix Inc |Inventors=Bozidar Janko |Filing date=1978-08-31 |Grant date=1980-02-12 }}")