Patents by Inventor Long-Shi Hwang

Long-Shi Hwang 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).

  • Musical toy tumbler
    Patent number: 4931029
    Abstract: Th present invention is related to a modification made on a regular toy tumbler to let the toy tumbler be equipped with a sound generating IC controlled by a plate spring type microswitch. When the toy tumbler stands still, the microswitch is OFF, and no sound is generated. When the toy tumbler is rocking, the microswitch is ON, and the sound generating IC is triggered to provide audio signal through an electronic speaker. Matching with the innovative outer appearance, the toy tumbler is bestowed with a new life.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: June 5, 1990
    Assignee: Kyooh Precision Industry Co., Ltd.
    Inventor: Long-Shi Hwang