TREA

Donald A. Holtkamp

Follow

Person

  • Battle Creek, MI, US
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Hydraulic cylinder extension control
    • Patent number 4,062,269
    • Issue date Dec 13, 1977
    • Clark Equipment Company
    • Willard L. Chichester
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Mechanical piston retention for free wheeling
    • Patent number 3,978,771
    • Issue date Sep 7, 1976
    • Clark Equipment Company
    • Thomas R. Burnight
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Hydrostatic propulsion system
    • Patent number 3,978,937
    • Issue date Sep 7, 1976
    • Clark Equipment Company
    • Willard L. Chichester
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...