Norman Twizell

Person

  • Morpeth, GB

Patents Grantslast 30 patents

  • Information Patent Grant

    Automatic backwashing filter

    • Patent number 4,673,498
    • Issue date Jun 16, 1987
    • Swinney Engineering Limited
    • Denis P. Swinney
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL