Patents by Inventor Chak Y. Cheng

Chak Y. Cheng 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).

  • Candle holder
    Patent number: 5622490
    Abstract: A musical candle holder has a body. A cylindrical plug frictionally fits inside the body and supports a loudspeaker and a printed circuit board. A battery and a melody chip are mounted on the board. Exposed conductors (not shown) are shorted by a slider when required and provides a switch to turn on the chip.The slider has a finger which extends out of the bottom of the body to allow manual operation of the switch.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 22, 1997
    Inventor: Chak Y. Cheng