Patents by Inventor Tokio Muta

Tokio Muta 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).

  • Transformer and switching regulator that prevents winding's caused by magnetic field leakage
    Patent number: 6185113
    Abstract: A transformer and switching regulator that prevents winding's breakdown caused by the leakage magnetic field. A transformer has a core having an air gap, and a winding wound around the core. The turn density of the winding is made least on the air gap. The switching regulator has such a transformer.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: February 6, 2001
    Assignee: Fujitsu Limited
    Inventors: Yuichi Sato, Tokio Muta, Kazuo Shimada
  • Image forming apparatus, control method for controlling the same and temperature control apparatus
    Patent number: 6018140
    Abstract: An image forming apparatus includes a fixing unit having a heat source, a temperature detecting unit for detecting a temperature of the fixing unit, an initial operation necessity detecting unit for determining whether an initial operation should be performed in the image forming apparatus, an initial operation selecting control unit for selecting an initial operation from among a plurality of predetermined initial operations based on the temperature detected by the temperature detecting unit when the initial operation necessity detecting unit detects that the initial operation should be performed, and a control unit for controlling the fixing unit so that the fixing unit performs the initial operation selected by the initial operation selecting control unit.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: January 25, 2000
    Assignee: Fujitsu Limited
    Inventors: Kazunori Hirose, Takashi Matsuya, Akihiro Komuro, Nobuyuki Hayashida, Kazuo Shimada, Keisuke Nakamura, Yutaka Yamauchi, Tokio Muta, Yoshihiro Takamatsuya, Mitsuo Nakamura
  • Image forming apparatus, control method for controlling the same and temperature control apparatus
    Patent number: 5758228
    Abstract: An image forming apparatus includes a fixing unit having a heat source, a temperature detecting unit for detecting a temperature of the fixing unit, an initial operation necessity detecting unit for determining whether an initial operation should be performed in the image forming apparatus, an initial operation selecting control unit for selecting an initial operation from among a plurality of predetermined initial operations based on the temperature detected by the temperature detecting unit when the initial operation necessity detecting unit detects that the initial operation should be performed, and a control unit for controlling the fixing unit so that the fixing unit performs the initial operation selected by the initial operation selecting control unit.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: May 26, 1998
    Assignee: Fujitsu Limited
    Inventors: Kazunori Hirose, Takashi Matsuya, Akihiro Komuro, Nobuyuki Hayashida, Kazuo Shimada, Keisuke Nakamura, Yutaka Yamauchi, Tokio Muta, Yoshihiro Takamatsuya, Mitsuo Nakamura