Patents by Inventor Masao Ohmori

Masao Ohmori 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).

  • Light-emitting element driving device
    Patent number: 6967978
    Abstract: In a semiconductor laser driving device using a voltage drive system, a drive current of a semiconductor laser is controlled by a drive current control circuit so that a light intensity of light beam emitted from the semiconductor laser is equal to a predetermined light intensity. In a drive voltage control circuit, the drive voltage applied to the semiconductor laser at the time of switching off the semiconductor laser LD is set on the basis of the detected voltage (terminal voltage).
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: November 22, 2005
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Masao Ohmori
  • Light-emitting device driver and image forming apparatus
    Publication number: 20050029965
    Abstract: A light-emitting device driver that includes a driver unit that drives a light-emitting device, a compensator that compensates for at least one of the rising and falling responses of the driver unit, a switching unit that switches on and off the compensator, and a control unit that performs on/off control on the switching unit.
    Type: Application
    Filed: August 2, 2004
    Publication date: February 10, 2005
    Inventors: Hidehiko Yamaguchi, Chikaho Ikeda, Hideki Moriya, Masao Ohmori
  • Light-emitting element driving device
    Publication number: 20040124788
    Abstract: In a semiconductor laser driving device using a voltage drive system, a drive current of a semiconductor laser is controlled by a drive current control circuit so that a light intensity of light beam emitted from the semiconductor laser is equal to a predetermined light intensity. In a drive voltage control circuit, the drive voltage applied to the semiconductor laser at the time of switching off the semiconductor laser LD is set on the basis of the detected voltage (terminal voltage).
    Type: Application
    Filed: July 8, 2003
    Publication date: July 1, 2004
    Applicant: FUJI XEROX CO., LTD.
    Inventor: Masao Ohmori
  • Process for preparing polyarylene sulfides under reduced pressure
    Patent number: 5194580
    Abstract: A process for preparing a polyarylene sulfide involves dehydrating a mixture of a hydrous sulfur source and an organic polar solvent under a reduced pressure in a rectification tower and contacting a dihalogen aromatic compound with a dehydrated sulfur source in the organic polar solvent.This process provides the polyarylene sulfide with a white color and a higher molecular weight.
    Type: Grant
    Filed: August 1, 1989
    Date of Patent: March 16, 1993
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Yoshinari Koyama, Daigo Shirota, Masao Ohmori, Minoru Senga