Patents by Inventor Yasusuke Seki

Yasusuke Seki 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).

  • Circular fluorescent lamp
    Patent number: 5034655
    Abstract: A fluorescent lamp has at least a pair of electrodes, at least two circular discharge tubes connected to said electrodes and enclosing rare gas and mercury therein, and a phosphor coating provided on an inside wall of each of said discharge tubes, the two circular discharge tubes being arranged coaxially circularly on one and the same plane, the diameter of each of the discharge tubes being selected to have a value within a range of from 5 mm to 25 mm both inclusive, the luminance on surface of each of the discharge tubes being selected to have a value within a range of from 2.times.10.sup.4 Cd/m.sup.2 to 6.times.10.sup.4 Cd/m.sup.2.
    Type: Grant
    Filed: August 24, 1989
    Date of Patent: July 23, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Seiichi Murayama, Hiromitsu Matsuno, Tetsuo Ono, Yasusuke Seki, Atsuo Koyama, Churyo Kodama, Tsuyoshi Kobayashi
  • Combined television and radio receiver
    Patent number: D252684
    Type: Grant
    Filed: April 14, 1977
    Date of Patent: August 21, 1979
    Assignee: Hitachi, Ltd.
    Inventors: Yasusuke Seki, Takeshi Abe
  • Combined cassette recorder, radio and television
    Patent number: D261643
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: November 3, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Yasusuke Seki, Takeshi Abe
  • Television receiver
    Patent number: D269677
    Type: Grant
    Filed: April 21, 1981
    Date of Patent: July 12, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Taisuke Kashima, Shigeki Gushiken, Kazuyuki Tsuburaya, Yasusuke Seki
  • Television receiver
    Patent number: D270638
    Type: Grant
    Filed: June 12, 1979
    Date of Patent: September 20, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Akira Takahashi, Yasusuke Seki, Takeshi Abe
  • Television receiver
    Patent number: D274190
    Type: Grant
    Filed: August 26, 1981
    Date of Patent: June 5, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Fumitaka Ito, Yasusuke Seki, Kazuyuki Tsuburaya
  • Tank for a battery-operated sprayer
    Patent number: D294061
    Type: Grant
    Filed: April 24, 1985
    Date of Patent: February 2, 1988
    Assignee: Kyusyu Hitachi Maxell, Ltd.
    Inventors: Yoshimasa Yokoyama, Masaru Komiya, Yasusuke Seki
  • Hair curling iron
    Patent number: D294743
    Type: Grant
    Filed: December 26, 1985
    Date of Patent: March 15, 1988
    Assignee: Kyusyu Hitachi Maxell, Ltd.
    Inventors: Yasusuke Seki, Masaru Komiya, Maki Fujisawa, Misako Takahashi