TREA

Klaus-Peter Helmetag

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  • Hagen-Holthausen, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Composite shadow mask
    • Patent number 5,863,681
    • Issue date Jan 26, 1999
    • Wickeder Westgalenstahl GmbH
    • Klaus-Peter Helmetag
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Composite shiftable aperture mask
    • Patent number 5,686,784
    • Issue date Nov 11, 1997
    • Wickeder Westfalenstahl GmbH
    • Roland Thoms
    • H01 - BASIC ELECTRIC ELEMENTS