Patents by Inventor Pu-Chen Yeh

Pu-Chen Yeh 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).

  • Adjustable bubble bend
    Patent number: 5098614
    Abstract: The present invention relates to an adjustment bubble bend. The structure of the adjustable bubble bend allows the user to control the volume of the bubbles produced by the device and to reduce the noise emitted from the device during operation.
    Type: Grant
    Filed: January 14, 1991
    Date of Patent: March 24, 1992
    Inventors: Chiu-Tseng L. Yeh, Pu-Chen Yeh