Patents by Inventor Nelson S. Chang

Nelson S. Chang 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).

  • Bubbling self-propelled toy
    Patent number: 4556392
    Abstract: This invention relates to a self-driven bubbling toy, in the form of a bubbling octopus. It comprises a blowing means to produce an air jet and a delivering means to deliver an amount of frothing liquid from a reservoir to the route of said jet to blow it into bubbles, thereby increasing the amusement of the toy. Various sound and light effects can be applied to this toy.
    Type: Grant
    Filed: July 24, 1984
    Date of Patent: December 3, 1985
    Inventor: Nelson S. Chang