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John Hallman

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  • Rockford, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Centrifugal liquid pump with cavitation surge suppression
    • Patent number 4,844,691
    • Issue date Jul 4, 1989
    • Sundstrand Corporation
    • John H. Hallman
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Lubrication scavenge system
    • Patent number 4,631,009
    • Issue date Dec 23, 1986
    • Sundstrand Corporation
    • John E. Cygnor
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...