Patents by Inventor Nien-Tu Liu

Nien-Tu Liu 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
    Publication number: 20050180589
    Abstract: A speaker comprises at least one long round shape resonance tube, in which comprises at least one speaker with at least one signal line disposed at one end of the resonance tube.
    Type: Application
    Filed: January 12, 2005
    Publication date: August 18, 2005
    Inventor: Nien-Tu Liu