Patents by Inventor Hirotaka Takei

Hirotaka Takei 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).

  • High-frequency power supply device
    Publication number: 20050259450
    Abstract: The invention relates to a HF power supply device including an oscillator (11) outputting a HF signal, an amplifier (12) amplifying the output of the oscillator for supplying a HF output to a load, and a DC power supply (13) to supply a DC power voltage to the amplifier (11). The power supply device further includes a loss calculator (18) calculating a loss in the amplifier (11), a first controller (19) controlling the output of the power supply (13) and a second controller (20) controlling the output of the oscillator (11) or amplifier (12). When the calculated loss by the calculator (18) exceeds a predetermined loss set value, the first controller (19) lowers the output power voltage of the power supply (13) to make the calculated loss equal to the loss set value.
    Type: Application
    Filed: February 5, 2004
    Publication date: November 24, 2005
    Applicant: DAIHEN CORPORATION
    Inventors: Hiroyuki Kotani, Hirotaka Takei, Hiroyuki Ito, Tatsuya Ikenari, Yoshiki Fukumoto