Patents by Inventor Takao Katsuki

Takao Katsuki 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).

  • Electroacoustic transducer
    Patent number: 6501845
    Abstract: There is provided an electroacoustic transducer 1 including a base 24 made of magnetic material, a magnetic core 22 made of magnetic material and provided erectly on the base 24, a diaphragm 20 made of magnetic material and supported with a gap between the diaphragm and a forward end of the magnetic core, a magnet 25 constituting a magnetic circuit together with the base 24, the magnetic core 22 and the diaphragm 20 so as to provide a magnetostatic field, a coil 23 disposed around the magnetic core for applying an oscillating magnetic field to the magnetic circuit, a coil bobbin 30 for holding the coil 23, and a housing 10 for receiving these above-mentioned members. The coil bobbin 30 is integrally molded with the magnetic core 22 and the base member 24.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: December 31, 2002
    Assignee: Star Micronics Co., Ltd.
    Inventors: Youichi Gotoh, Yoshiharu Oishi, Takao Katsuki, Susumu Tanikawa, Morimasa Fushimi
  • Electroacoustic transducer
    Publication number: 20020025058
    Abstract: There is provided an electroacoustic transducer 1 including a base 24 made of magnetic material, a magnetic core 22 made of magnetic material and provided erectly on the base 24 a diaphragm 20 made of magnetic material and supported with a gap between the diaphragm and a forward end of the magnetic core, a magnet 25 constituting a magnetic circuit together with the base 24, the magnetic core 22 and the diaphragm 20 so as to provide a magnetostatic field, a coil 23 disposed around the magnetic core for applying an oscillating magnetic field to the magnetic circuit, a coil bobbin 30 for holding the coil 23, and a housing 10 for receiving these above-mentioned members. The coil bobbin 30 is integrally molded with the magnetic core 22 and the base member 24.
    Type: Application
    Filed: August 30, 2001
    Publication date: February 28, 2002
    Inventors: Youichi Gotoh, Yoshiharu Oishi, Takao Katsuki, Susumu Tanikawa, Morimasa Fushimi