Patents by Inventor Kiyoshi Sawatari

Kiyoshi Sawatari 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: 4482842
    Abstract: In a curved tube type ultra high pressure mercury discharge lamp device of the type comprising an arcuate glass tube, a quantity of mercury contained in both ends of the glass tube and electrodes projecting into the glass tube beyond surfaces of the mercury for creating electric discharge between the electrodes, throttles are formed on an inner surface of the glass tube near the electrodes. The throttles have diameters smaller than an inner diameter of the glass tube and the mercury is contained in spaces between the throttles and the both ends of the glass tube.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: November 13, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Fujimura, Yoshifumi Tomita, Kiyoshi Sawatari