David E. Barnhart

Person

  • Pontiac, MI, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Valve stem seal

    • Patent number 4,317,436
    • Issue date Mar 2, 1982
    • General Motors Corporation
    • David E. Barnhart
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES