Patents by Inventor Sadahiro Yanai

Sadahiro Yanai 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).

  • Discharging method and small fluorescent lamp using the discharging method
    Patent number: 5107183
    Abstract: A charging method within a glass tube using a direct current of low voltage is provided in order to obtain a small fluorescent lamp with a light emission of high luminance. Two distinct discharges are achieved through use of one negative electrode. The filament-like negative electrode is arranged at a short spaced relation to a positive electrode at one end of the glass tube and upon application of the direct current voltage becomes the preliminary discharge. A second positive electrode is positioned at the opposite end of the glass tube and has a greater-spaced relation to the negative electrode resulting in the second discharge.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: April 21, 1992
    Assignee: Minipilo Electric Co., Ltd.
    Inventors: Hitoshi Yamamoto, Sadahiro Yanai