wherein the contacts are opened by the flow of liquid

Patents Grantslast 30 patents

  • Information Patent Grant

    2619568

    • Patent number 2,619,568
    • Issue date Nov 25, 1952
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    1904519

    • Patent number 1,904,519
    • Issue date Apr 18, 1933
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    1530120

    • Patent number 1,530,120
    • Issue date Mar 17, 1925
    • H01 - BASIC ELECTRIC ELEMENTS