Patents by Inventor Qingqiang Li

Qingqiang Li 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).

  • MEDICAL DEVICE
    Publication number: 20180265112
    Abstract: The present invention provides a medical device comprising: a main body; and two or more fixed casters and at least one floating caster, which are connected to a bottom portion of said main body and support said main body, wherein said floating caster is capable of floating in the vertical direction relative to said main body.
    Type: Application
    Filed: March 13, 2018
    Publication date: September 20, 2018
    Inventors: Yalan Yang, Zibo Yang, Qingqiang Li