Patents by Inventor Yonggang He

Yonggang He 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).

  • Ink cartridge for inkjet printer
    Publication number: 20070222840
    Abstract: A valve core of an ink cartridge includes an elastic valve sheet having an inner portion and an outer portion. The outer portion extends outwards from the inner portion and protrudes towards an upstream side of the valve core. The outer portion is adapted to sealingly engage and disengage with a valve seat in which the valve core is mounted.
    Type: Application
    Filed: March 26, 2007
    Publication date: September 27, 2007
    Inventors: Qingguo Xiao, Benyou Jin, Leung Ho, Yonggang He, Yongzhong Tian