Patents by Inventor Xuanli Liu

Xuanli 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).

  • Percutaneous needle with entry for insertion of a wire
    Patent number: 6371944
    Abstract: A needle is attached to a connector portion having a common passage with an an arm with a lumen that has a one-way valve which prevents flow of fluid from the needle through the lumen of the arm which acts as a conduit for insertion of a wire into the channel of the needle that has been inserted into a blood vessel. The connector portion having the arm may be provided as a separable adapter for use with a conventional needle hub or may be a part of the needle assembly.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: April 16, 2002
    Inventors: Xuanli Liu, Yuenian E. Shi