Patents by Inventor Yasuhisa Abe

Yasuhisa Abe 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).

  • Speaker apparatus and manufacturing method thereof
    Patent number: 6343136
    Abstract: A speaker apparatus includes a frame having a magnetic circuit, a voice coil bobbin installed in the frame to be magnetically coupled to the magnetic circuit, and a diaphragm movably installed in the frame and fixed to the voice coil bobbin so as to be driven by activating the magnetic circuit. The diaphragm has a positioning portion that had been used for securing the diaphragm relative to the magnetic circuit during an installation of the diaphragm in the frame.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: January 29, 2002
    Assignees: Pioneer Electronic Corporation, Tohoku Pioneer Electronic Corporation
    Inventors: Takeshi Tokusho, Yasuhisa Abe, Fumio Murayama
  • SPEAKER APPARATUS AND MANUFACTURING METHOD THEREOF
    Publication number: 20010043713
    Abstract: A speaker apparatus includes a frame having a magnetic circuit, a voice coil bobbin installed in the frame to be magnetically coupled to the magnetic circuit, and a diaphragm movably installed in the frame and fixed to the voice coil bobbin so as to be driven by activating the magnetic circuit. The diaphragm has a positioning portion that had been used for securing the diaphragm relative to the magnetic circuit during an installation of the diaphragm in the frame.
    Type: Application
    Filed: March 24, 1998
    Publication date: November 22, 2001
    Inventors: TAKESHI TOKUSHO, YASUHISA ABE, FUMIO MURAYAMA
  • Refractory for casting a basic substance
    Patent number: 5104833
    Abstract: A refractory for casting a basic substance comprises 100 parts by weight of a refractory aggregate having as main ingredients 3 to 40% by weight of zircon and 97 to 60% by weight of magnesia and a suitable amount of a binding agent. Another refractory for casting a basic substance comprises 100 parts by weight of a refractory aggregate having as main ingredients 3 to 40% by weight of zircon and 97 to 60% by weight of magnesia, not more than 7 parts by weight of metallic fibers, and a suitable amount of a binding agent. The refractories for casting a basic substance are used for ladles, tundishes, vacuum degasing furnaces, mixers, and the like.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: April 14, 1992
    Assignees: Harima Ceramic Co. Ltd., Nippon Steel Corporation
    Inventors: Osami Matsumoto, Toshihiro Isobe, Hisashi Matsuoka, Yasuhisa Abe