Patents by Inventor Cheng H. Hung

Cheng H. Hung 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).

  • Cassette type stereo speaker system
    Patent number: 4764961
    Abstract: A cassette type stereo speaker system comprises a body case, a screen, a vibrating sheet, a voice coil, a magnetic path system and a plug. The magnetic path system includes a yoke iron, a center magnet, and a ferrite magnet. The vibrating sheet is a very thin sheet to be mounted over the voice coil. The whole speaker system has the features of being simple in structure, and being convenient to a user to carry or to store it.
    Type: Grant
    Filed: November 6, 1986
    Date of Patent: August 16, 1988
    Inventor: Cheng H. Hung