Patents Assigned to Marston Radiators Limited
  • Detection apparatus
    Patent number: 3976121
    Abstract: A conductivity probe unit comprising a chamber with a restricted entrance and an internal button electrode, the chamber being located in the header tank of a radiator.
    Type: Grant
    Filed: November 18, 1974
    Date of Patent: August 24, 1976
    Assignee: Marston Radiators Limited
    Inventor: Martin Stanley Johnson