Patents by Inventor Toyotsubu Matsukura

Toyotsubu Matsukura 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 heating apparatus
    Patent number: 7414228
    Abstract: There is constructed a constitution such that a shunt resistor 30 is interposed in series with a portion capable of measuring an output current of a unidirectional power source portion 1 of a high frequency heating apparatus and a voltage generated at the shunt resistor 30 is outputted by a buffer 31. Further, an operational amplifier 3101 having a high input impedance is used for the buffer 31. Further, a diode bridge 101 and a semiconductor switching element 205 are fixed to a common heat radiating plate 33, the heat radiating plate 33 is formed with a notched portion 33a to thereby ensure insulating distances to the diode bridge 101 and the semiconductor switching element 205, and the shunt resistor 30 is arranged on a straight line the same as that between the diode bridge 101 and the semiconductor switching element 205.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: August 19, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Haruo Suenaga, Hideaki Moriya, Hisashi Morikawa, Shinichi Sakai, Makoto Mihara, Nobuo Shirokawa, Toyotsubu Matsukura, Masato Matsuda