Patents by Inventor Toncil Cha

Toncil Cha 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).

  • Non-toxic rubber-based composition and method for making the rubber based composition
    Patent number: 5087651
    Abstract: A non-toxic rubber-based composition for use in manufacturing toys which contains styrene butadiene rubber, naphthene oil, ester gum, calcium carbonate and a coloring agent, and a method for making same.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: February 11, 1992
    Assignee: Pop Limited
    Inventor: Toncil Cha