John M. Retterer

Person

  • Caledonia, OH, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Combination cylinder and pistons

    • Patent number 6,314,862
    • Issue date Nov 13, 2001
    • Retterer Manufacturing Co., Inc.
    • John M. Retterer
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES