Patents by Inventor Yu Ling Zhang

Yu Ling Zhang 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).

  • Dispensing closure for container
    Patent number: D588915
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: March 24, 2009
    Assignee: Portola Packaging, Inc.
    Inventors: Richard D. Lohrman, Yu Ling Zhang
  • Dispensing closure for container
    Patent number: D608198
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: January 19, 2010
    Assignee: Portola Packaging, Inc.
    Inventors: Richard D. Lohrman, Yu Ling Zhang