Patents by Inventor Helen C. Chan

Helen C. Chan 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 figure
    Patent number: D271404
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: November 15, 1983
    Assignees: Alfred Eli Simmons, Kui-Yan Lung
    Inventor: Helen C. Chan