TREA

Henry John Hattendorf

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  • Grand Prairie, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Two-speed video recorder
    • Patent number 4,075,900
    • Issue date Feb 28, 1978
    • Henry John Hattendorf
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Two-speed video recorder
    • Patent number 4,062,248
    • Issue date Dec 13, 1977
    • Henry John Hattendorf
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...