Donald J. Hackman

Person

  • Upper Arlington, OH, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus for pneumatic excavation

    • Patent number 5,487,229
    • Issue date Jan 30, 1996
    • Electric Power Research Institute, Inc.
    • Richard D. Nathenson
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING