Patents by Inventor Leung Mui Ho

Leung Mui Ho 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
    Patent number: 7988266
    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: Grant
    Filed: March 26, 2007
    Date of Patent: August 2, 2011
    Assignee: Print-Rite Technology Development Co., Ltd. of Zhuhai
    Inventors: Qingguo Xiao, Benyou Jin, Leung Mui Ho, Yonggang He, Yongzhong Tian