Patents by Inventor Hsin-Chun Liao

Hsin-Chun Liao 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).

  • Toy submarine ballast system
    Patent number: 5865663
    Abstract: A ballast system for toy submarines comprises a plumbing device, a flexible bag, a piece of wire and a rod. The ballast system draws water in and forces water out by decompressing and compressing the flexible bag.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: February 2, 1999
    Inventor: Hsin-Chun Liao