John L. Schlafer

Person

  • Woodbury, MN, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Permanganate feeder for iron filter

    • Patent number 6,210,646
    • Issue date Apr 3, 2001
    • Ecowater Systems, Inc.
    • Ralph H. Larson
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL