Patents by Inventor Paul-Chia Lee

Paul-Chia Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pressure switch
    Patent number: 7297885
    Abstract: A water pressure switch employs two pivotable plates and springs to control the activation of the pump. The arrangement of the two pivotably plates, the springs and the activation device reduces the space required so that a small box can accommodate all the parts.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: November 20, 2007
    Inventor: Paul Chia Lee
  • Pressure switch
    Patent number: 7112753
    Abstract: A water pressure switch employs two pivotable plates and springs to control the activation of the pump. The arrangement of the two pivotably plates, the springs and the activation device reduces the space required so that a small box can accommodate all the parts.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: September 26, 2006
    Inventor: Paul-Chia Lee