Patents by Inventor Fumiji Omura

Fumiji Omura 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).

  • Electric discharge tube, method of manufacturing the tube, stroboscopic device using the tube and camera
    Patent number: 6810208
    Abstract: An electric discharge tube withstands a large electric input, and has a small size. This discharge tube provides a small photographic strobe device and a small photographic camera. The discharge tube includes a glass bulb having a wall thickness ranging from 0.2 to 0.6 mm and filled with rare gas, a pair of main electrodes provided at both ends of the glass bulb, respectively, a trigger electrode formed on the outer surface of the glass bulb, and a film of silicon dioxide having a thickness ranging from 0.05 to 0.11 &mgr;m formed inside of the glass bulb. An electric power not larger than 0.90 Ws/mm3 with respect to the inner volume of the glass bulb is applied between the main electrodes.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: October 26, 2004
    Assignee: West Electric Co., Ltd.
    Inventors: Hiroshi Saiki, Fumiji Omura, Tsutomu Takahashi
  • Electric discharge tube, method of manufacturing the tube, stroboscopic device using the tube and camera
    Publication number: 20040114917
    Abstract: An electric discharge tube withstands a large electric input, and has a small size. This discharge tube provides a small photographic strobe device and a small photographic camera. The discharge tube includes a glass bulb having a wall thickness ranging from 0.2 to 0.6 mm and filled with rare gas, a pair of main electrodes provided at both ends of the glass bulb, respectively, a trigger electrode formed on the outer surface of the glass bulb, and a film of silicon dioxide having a thickness ranging from 0.05 to 0.11 &mgr;m formed inside of the glass bulb. An electric power not larger than 0.90 Ws/mm3 with respect to the inner volume of the glass bulb is applied between the main electrodes.
    Type: Application
    Filed: February 4, 2004
    Publication date: June 17, 2004
    Inventors: Hiroshi Saiki, Fumiji Omura, Tsutomu Takahashi