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William A. Hatsell

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  • Hatfield, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ribbon threading assembly for an impact printer
    • Patent number 4,265,553
    • Issue date May 5, 1981
    • Exxon Research and Engineering Co.
    • William A. Hatsell
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Printer ribbon lift assembly
    • Patent number 4,203,677
    • Issue date May 20, 1980
    • Exxon Research and Engineering Co.
    • William A. Hatsell
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Ribbon mounting apparatus
    • Patent number 4,203,676
    • Issue date May 20, 1980
    • Exxon Research and Engineering Co.
    • William A. Hatsell
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS