Patents by Inventor Hiromitsu Matsuno

Hiromitsu Matsuno 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).

  • Stain resistant fluorescent lamp
    Patent number: 4642512
    Abstract: A low-pressure mercury vapor discharge lamp comprising a glass tube in which a metal oxide or phosphate layer and then a phosphor layer are formed on its inner surface, in which during operation of the lamp, the lowest temperature of the wall of the glass tube along its discharge path is kept at 80.degree. C. or above.
    Type: Grant
    Filed: November 1, 1984
    Date of Patent: February 10, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Hiromitsu Matsuno, Seiichi Murayama, Tetsuo Ono
  • Low-pressure mercury vapor discharge lamp
    Patent number: 4611148
    Abstract: A low-pressure mercury vapor discharge lamp in which a rare gas and mercury are provided in an outer bulb, which in turn contains therein a plurality of bent inner tubes, each having an opening at an end and an electrode at the other end thereof. A starting probe is provided between the openings in the outer bulb. An operating circuit or starter is connected to the electrodes. Further, a starting probe circuit is connected to the starting probe to apply a high voltage to the starting probe at the time of ignition.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: September 9, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Yasuo Kato, Tetsuo Ono, Yoshio Watanabe, Seiichi Murayama, Shigeo Mikoshiba, Hiromitsu Matsuno
  • Low-pressure mercury vapor discharge lamp
    Patent number: 4587453
    Abstract: A low-pressure mercury vapor discharge lamp comprising an envelope forming a gas-tight closed space and a pair of inner tubes provided in the closed space and having an end thereof sealed at the first end of the outer envelope, the other end thereof being opened into the closed space, and electrodes provided at the sealed end sides in the inner tubes. The temperature of the coldest spot of the envelope is in a range between 45.degree. C. and 65.degree. C. at an ambient temperature of 25.degree. C.
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: May 6, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuo Ono, Yoshio Watanabe, Hiromitsu Matsuno, Yasuo Kato, Seiichi Murayama, Shigeo Mikoshiba