Patents by Inventor Hugh C. Hsieh

Hugh C. Hsieh 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).

  • Publication number: 20140270269
    Abstract: A loudspeaker device includes a rear frame member defining a receiving space, a magnetic assembly, and a sound producing assembly. The magnetic assembly includes a yoke, a magnet, a magnetically permeable plate that cooperates with the yoke to form an air gap, and a connecting tube that passes through and fastens together the yoke, the magnet and the magnetically permeable plate, that is heat conductive, and that defines an axially extending air passageway in fluid communication with the receiving space. The sound producing assembly includes a vibrating member that cooperates with the magnetically permeable plate to define a chamber in fluid communication with the air passageway and the air gap.
    Type: Application
    Filed: March 18, 2013
    Publication date: September 18, 2014
    Inventor: Hugh C. Hsieh
  • Patent number: D322253
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: December 10, 1991
    Inventor: Hugh C. Hsieh