Patents by Inventor Yongqian R. Liu

Yongqian R. Liu 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).

  • Modular optical medical diagnostic system
    Patent number: 8786689
    Abstract: An optical medical diagnostic system is disclosed comprising a LED light assembly, a controller portion and a power portion where the modular LED light assembly can switch from one operating wavelength LED light assembly to another wavelength LED light assembly. The generated fluorescence image may be viewed through a fluorescence band pass filter assembly mounted on the light handle and viewing angle can be adjusted through its tilt arm. The band pass filter blocks the excitation wavelength and passes the fluorescence wavelength.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: July 22, 2014
    Inventor: Yongqian R. Liu