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John D. Spargo

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  • Annapolis, MD, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Impeller assembly for processing device
    • Patent number 5,348,236
    • Issue date Sep 20, 1994
    • The United States of America as represented by the Secretary of the Navy
    • John D. Spargo
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Elastomeric mount for thrust bearing shoe
    • Patent number 4,892,417
    • Issue date Jan 9, 1990
    • The United States of America as represented by the United States Department o...
    • John D. Spargo
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydrostatic supporting device
    • Patent number 4,749,282
    • Issue date Jun 7, 1988
    • The United States of America as represented by the Secretary of the Navy
    • John D. Spargo
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Leak free floating packing shaft seal
    • Patent number 4,572,518
    • Issue date Feb 25, 1986
    • The United States of America as represented by the Secretary of the Navy
    • John D. Spargo
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Pressure balanced floating seal
    • Patent number 4,494,760
    • Issue date Jan 22, 1985
    • The United States of America as represented by the Secretary of the Navy
    • John D. Spargo
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Fluid lubricated floating bushing seal
    • Patent number 4,334,688
    • Issue date Jun 15, 1982
    • The United States of America as represented by the Secretary of the Navy
    • John D. Spargo
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Balanced airflow control valve for helicopter blade
    • Patent number 3,964,838
    • Issue date Jun 22, 1976
    • John D. Spargo
    • B64 - AIRCRAFT AVIATION COSMONAUTICS