James O. Mumper

Person

  • Tiffin, OH, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Electrical grounding rod driving device

    • Patent number 4,557,409
    • Issue date Dec 10, 1985
    • E & J Demark, Inc.
    • J. Edwin Hecock
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS