Patents by Inventor Mark Tsao

Mark Tsao 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).

  • Patent number: 6243478
    Abstract: A flat speaker without grille mounted thereon for a computer comprises a cabinet having a center recess with a circumferential flange formed in recess for securing speaker cone, a paper corrugation of the speaker glued to a diaphragm by a sticky ring for enabling a synchronous motion of diaphragm and corrugation, and a cushion provided along an inner perimeter of diaphragm for acting as a cushion between diaphragm and cabinet without interfering with the motion of diaphragm, wherein diaphragm may produce a sound by means of the speaker. A pattern may be printed or painted along an outer perimeter of the diaphragm. Further, two opposing longitudinal side grooves may receive a photograph therebetween for acting as a photo frame, and a three-way connector are provided on back of cabinet having three openings for securing cabinet to base in three directions.
    Type: Grant
    Filed: October 6, 1999
    Date of Patent: June 5, 2001
    Inventor: Mark Tsao