Patents by Inventor Sylvia Tai-In Chang

Sylvia Tai-In 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).

  • Lid for an air-tight container
    Publication number: 20030178428
    Abstract: A lid for an air-tight container is composed of a base and a seal. The base has a circular groove defined in a bottom face thereof. The seal has a circular extension formed to correspond to the circular groove. When the circular extension is received in the circular groove, the engagement between the base and the seal is secured.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 25, 2003
    Inventor: Sylvia Tai-In Chang
  • Water jug
    Patent number: D460311
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: July 16, 2002
    Inventor: Sylvia Tai-In Chang
  • Plastic container
    Patent number: D434612
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: December 5, 2000
    Inventor: Sylvia Tai-In Chang