Patents by Inventor Mei Hsia Chang

Mei Hsia Chang 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).

  • Developer container
    Patent number: 6690904
    Abstract: A developer container in which the container body has an inwardly protruded spiral guide flange spirally extending from the rear close side to a developer supply port of the container body and defining a spiral flow guide way adapted to guide developer from the inside of the container body to the outside of the container body through the developer supply port, wherein the developer supply port having a recessed developer accumulation area and a through hole through the center of the recessed developer accumulation area, the spiral guide flange has a beveled guide face extending to the recessed developer accumulation area.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: February 10, 2004
    Assignee: General Plastics Industrial Co., Ltd.
    Inventors: Jui-Chi Wang, Robin Hsu, Ya Li Huang, Mei Hsia Chang
  • Developer container
    Publication number: 20030049052
    Abstract: A developer container in which the container body has an inwardly protruded spiral guide flange spirally forwardly extended to a developer supply port and defining a spiral flow guide way adapted to guide developer from the inside of the container body to the outside of the container body through the developer supply port, the developer supply port having a recessed developer accumulation area and a through hole through the center of the recessed developer accumulation area, the spiral guide flange having a beveled guide face extended to the recessed developer accumulation area.
    Type: Application
    Filed: September 7, 2001
    Publication date: March 13, 2003
    Inventors: Jui-Chi Wang, Robin Hsu, Ya Li Huang, Mei Hsia Chang
  • Toner cartridge
    Patent number: D458302
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: June 4, 2002
    Inventors: Jui-Chi Wang, Robin Hsu, Ya Li Huang, Mei Hsia Chang
  • Toner cartridge
    Patent number: D458960
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: June 18, 2002
    Inventors: Jui-Chi Wang, Robin Hsu, Mei Hsia Chang
  • Toner cartridge
    Patent number: D458961
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: June 18, 2002
    Inventors: Jui-Chi Wang, Robin Hsu, Mei Hsia Chang
  • Toner cartridge
    Patent number: D458962
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: June 18, 2002
    Inventors: Jui-Chi Wang, Robin Hsu, Mei Hsia Chang
  • Toner cartridge
    Patent number: D473588
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: April 22, 2003
    Assignee: General Plastic Industrial Co., Ltd.
    Inventors: Jui-Chi Wang, Robin Hsu, Mei Hsia Chang