James R. Blair

Person

  • Inver Grove Heights, MN, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Microwave assisted hard rock cutting

    • Patent number 5,003,144
    • Issue date Mar 26, 1991
    • The United States of America as represented by the Secretary of the Interior
    • David P. Lindroth
    • E21 - EARTH DRILLING MINING