Patents by Inventor Tsai-Chi Chang

Tsai-Chi 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).

  • Self-adhesive greeting card
    Publication number: 20030188466
    Abstract: A self-adhesive greeting card includes a card body folded into two sections, one of the sections being formed with a semi-circular perforated line and a pressed line joining two ends of the semi-circular perforated line to form a semi-circular tab, and a double-sided adhesive fastener having one side attached to one side of the semi-circular tab and another side provided with a cover, whereby the greeting card can be readily attached to anywhere as desired.
    Type: Application
    Filed: April 3, 2002
    Publication date: October 9, 2003
    Inventor: Tsai-Chi Chang