Patents Examined by Jewel Aryis
  • Level measurement method using measurements of water column pressure therefor
    Patent number: 5791187
    Abstract: For the apparatus and method to measure the water depth and level using a gas bubble type level meter, the measurement pipe for water column pressure is composed of plastic pipes of inside diameter of 2-4 mm; two measurement pipes for water column pressure are bounded that the elevation difference between the ends of two measurement pipes for water column pressure is .DELTA.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: August 11, 1998
    Assignee: Changmin Co., Ltd.
    Inventor: Hak Soo Chang