Patents by Inventor Takashi Sakugawa

Takashi Sakugawa 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).

  • Publication number: 20120134890
    Abstract: An ozone generator is provided with a pulse generator (110) that at least includes pulse generation means for generating a pulse voltage and a magnetic switch (SI2) adjusting pulse width of the generated pulse voltage, and a discharge reactor that is provided with a plurality of electrodes to which the pulse voltage for which the pulse width has been adjusted is applied, and that generates a discharge between the plurality of electrodes as a result of the pulse voltage, for which the pulse width has been adjusted, being applied thereto, and also generates ozone as a result of a raw material gas containing oxygen being supplied from the outside to between the electrodes where the discharge has been generated.
    Type: Application
    Filed: June 24, 2010
    Publication date: May 31, 2012
    Applicants: NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITY, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yohei Kinoshita, Takashi Sakugawa, Hidenori Akiyama
  • Publication number: 20100134776
    Abstract: A pulse power source which can perform high repetition of pulse signals by enhancing the throughput of a pulse source is provided. The pulse power source includes: a charger; an initial-stage capacitor section which is provided with a capacitor charged by the charger; and a magnetic pulse compression circuit which performs magnetic pulse compression of a pulse current generated by discharging a charge from the capacitor at the initial-stage capacitor section and, thereafter, outputs the pulse current. An exposure device which includes the pulse power source is also provided. The pulse power source includes, between the initial-stage capacitor section and the magnetic pulse compression circuit, a transistor which controls timing of discharging a charge from the initial-stage capacitor section, an inductor which constitutes a resonance circuit together with the capacitor at the initial stage capacitor section, and a diode which rectifies the pulse current.
    Type: Application
    Filed: March 26, 2008
    Publication date: June 3, 2010
    Applicant: National University Corporation Kumamoto University
    Inventors: Takashi Sakugawa, Hidenori Akiyama, Sunao Katsuki
  • Patent number: 5514918
    Abstract: A pulse generator is composed of switch means to switch supply of a first current through a circuit, a first condenser connected to the switch means in series and primary charged by the first current, voltage raising means having a primary winding serially connected to the first condenser and a secondary winding to obtain voltage output by the first current, magnetic switch means of current flow switchable having a primary winding serially connected to the secondary winding of the voltage raising means and a secondary winding, a second condenser connected to the secondary winding of the magnetic switch means and charged by the output therefrom, and discharging means connected to the second condenser to generate pulse discharge when charged voltage of the second condenser is applied thereto by switching the magnetic switch means.
    Type: Grant
    Filed: October 8, 1993
    Date of Patent: May 7, 1996
    Assignee: Kabushiki Kaisha Meidensha
    Inventors: Hiroshi Inatomi, Takashi Sakugawa, Hisashi Yanase, Takehisa Koganezawa, Kiyoshi Hara