Patents by Inventor Yugi Hiraoka

Yugi Hiraoka 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).

  • Liquid electrophotographic developing arrangement
    Patent number: 6070034
    Abstract: In the particular embodiments described in the specification, a liquid electrophotographic developing arrangement includes four developing units disposed adjacent to the image-bearing surface of an electrophotographic member, each developing unit containing a different color developer. Each developing unit has an elongated slit through which developer is applied to the image-bearing surface of the electrophotographic member and the liquid developer is magnetically retained in the space between the developing unit and the surface of the electrophotographic member. In one embodiment, the developer is retained by a ferrofluid which surrounds the elongated opening and is held in position by magnets disposed on opposite sides of the electrophotographic member.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: May 30, 2000
    Assignee: Aetas Technology Corporation
    Inventors: Yugi Hiraoka, Michio Matsumoto, Takeo Endo, Chi-Sheng Huang