Patents by Inventor Takafumi Nishioka

Takafumi Nishioka 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).

  • Patent number: 6574084
    Abstract: An electromagnetic repulsion drive switching device in which a contact-closing coil and a contact-opening coil are arranged to confront a conductive repulsive member, and in which a drive current is fed to a selected one of the individual coils from a capacitor charged to a predetermined charge voltage by a charging power source. A stationary contact and a movable contact are brought into and out of contact by a repulsion electromagnetic force generated between the coils and the repulsion member. A voltage control controls the output voltage of the charging power source so that the peak value of the drive current may fall within a range with respect to a temperature change of the capacitor. As a result, even if the working temperature of the capacitor changes, the drive current of the contact-closing coil and the contact-opening coil falls within a desired range.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: June 3, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yukimori Kishida, Hiroyuki Sasao, Chie Takahashi, Kazuhiko Kagawa, Yoichi Ueno, Eiji Moritoh, Takafumi Nishioka, Tokio Nakashima
  • Patent number: 5164746
    Abstract: An electrophotographic printer includes a photosensitive drum which has an outer circumference longer than the whole length of recording paper and which can be rotated selectively forward backword and at a variable speed; an LED head exposes the surface of the photosensitive drum to light so as to form a latent image ccomprising scanning lines a motor control circuit stops the photosensitive drum at a position such that the LED head is opposite a position on the drum corresponding to a scanning line of an input picture a developer can be separated from the surface of the photosensitive drum when the latent image is written and opposes the surface of the photosensitive drum when toner is adhered to the latent image to develop the latent image.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: November 17, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Takafumi Nishioka
  • Patent number: 5094970
    Abstract: In a light emitting diode array, an N-electrode layer (32) is extended from the bottom surface to the top surface of a semiconductor body (30) through the side surface. PN junctions (42) are exposed to the cleavage surface (S) and light is emitted therefrom. Since the N-electrode layer and P-electrode layers (41) are located on a common surface, the LED array can be mounted on a base plate through a soldering process. The LED array can be used without a self-focus lens array in an electric printer for photography.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: March 10, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Susumu Yoshida, Takafumi Nishioka
  • Patent number: 5045895
    Abstract: In a light emitting diode array, an N-electrode layer (32) is extended from the bottom surface to the top surface of a semiconductor body (30) through the side surface. PN junctions (42) are exposed to the cleavage surface (S) and light is emitted therefrom. Since the N-electrode layer and P-electrode layers (41) are located on a common surface, the LED array can be mounted on a base plate through a soldering process. The LED array can be used without a self-focus lens array in an electric printer for photography.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: September 3, 1991
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Susumu Yoshida, Takafumi Nishioka
  • Patent number: 5038186
    Abstract: In an LED array (100), opaque layer (38) is provided on a semiconductor body (30) having PN junctions (41). A through holes (40) having a relatively small diameter are formed in the opaque layer on the PN junctions. Light which is generated at the PN junctions is emitted only through the holes in the form of photobeams. The LED array can be used in an electronic printer for photography without a self-focus lens array.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: August 6, 1991
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takafumi Nishioka, Shigeo Tsuda