David D. Zeltinger

Person

  • Glenburn, ND, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Rig drawworks

    • Patent number 7,556,240
    • Issue date Jul 7, 2009
    • MW Industries, Inc.
    • Timothy W. Bauer
    • B66 - HOISTING LIFTING HAULING