Patents by Inventor Ziging Zhang

Ziging Zhang 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).

  • Surroundless loudspeaker
    Patent number: 5848173
    Abstract: A cylindrical frame is mounted in a cabinet and a magnetic circuit is provided at an end of the frame. A diaphragm having a peripheral free edge is connected to a coil bobbin and a cylindrical ring is secured to the free end edge and disposed in a cylindrical supporting portion of the frame. An annular sealing member is secured to the cylindrical ring so that an outside peripheral wall thereof is slidably contacted with an inside wall of the cylindrical supporting portion of the frame.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: December 8, 1998
    Assignee: Pioneer Electronic Corporation
    Inventors: Yoko Sato, Satoshi Kumada, Ziging Zhang, Junko Oba, Shinji Koyano, Takashi Morishige, Kohshiro Kogure, Yuichi Mohri, Tomohiro Suenaga, Shouichiro Terauchi, Tatsuya Ando, Takanobu Saito, Takashi Ohyaba, Shunichi Takahashi, Teruo Baba