Patents by Inventor Chuen M. Yeh

Chuen M. 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).

  • Positioning device for percutaneous needle insertion
    Patent number: 4841967
    Abstract: This invention is directed to a device for accurately positioning needles for percutaneous insertion which comprises the elements of a base having a vertically disposed support member at one end thereof, a plate rotator, a needle holder, a tilt angle adjuster for the needle holder, and an arcuate needle angle indicator.In a second embodiment, the needle holder further comprises a circular angle indicator which includes a circular angular tilt angle of the needle holder to be observed by reference to the circular disk.
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: June 27, 1989
    Inventors: Ming Z. Chang, Chuen M. Yeh, Chuen Y. Yeh