Patents by Inventor Daoquan Song

Daoquan Song 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).

  • Filament cartridge for 3D printing
    Patent number: D788195
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: May 30, 2017
    Assignee: PRINT-RITE • UNICORN IMAGE PRODUCTS CO., LTD. OF ZHUHAI
    Inventors: Li'an Liu, Daoquan Song, Kin Keung So