TREA

Gregory E. Sparks

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  • Waterloo, IA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Auxiliary hydraulic pump system
    • Patent number 5,201,174
    • Issue date Apr 13, 1993
    • Deere & Company
    • Dennis R. Barber
    • B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • Information Patent Grant

    Control system calibration
    • Patent number 5,012,415
    • Issue date Apr 30, 1991
    • Deere & Company
    • Thomas E. Boe
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Grant

    Control system calibration
    • Patent number 4,931,967
    • Issue date Jun 5, 1990
    • Deere & Company
    • Thomas E. Boe
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Grant

    Steering pressure responsive differential lock control system
    • Patent number 4,523,494
    • Issue date Jun 18, 1985
    • Deere & Company
    • Gregory E. Sparks
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Compactor device for large round bales
    • Patent number 4,177,723
    • Issue date Dec 11, 1979
    • Iowa State University Research Foundation, Inc.
    • Wesley F. Buchele
    • B30 - PRESSES