Patents by Inventor Eun-ah Song

Eun-ah 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).

  • Wet electrophotographic image forming machine and method for recognizing a use life of a development cartridge used therein
    Publication number: 20040184829
    Abstract: A wet electrophotographic image forming machine that informs a user of a timing for replacing development cartridges. The image forming machine comprises a control section for sensing the condition of the developer stored in one or more developer housings on the basis of a measured electric current flowing between one or more developer feeding members and one or more developer application members via the developer provided therebetween, and a display section for externally displaying the developer condition according to a signal from the control section. The control section evaluates the magnitude of the electric current and provides a signal to the control section for display if there is a developer amount or concentration deficiency.
    Type: Application
    Filed: February 4, 2004
    Publication date: September 23, 2004
    Inventors: Joong-gwang Shin, Geun-yong Park, Eun-ah Song, Jong-woo Kim