Patents by Inventor Randal W. Stringfield

Randal W. Stringfield 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).

  • Container End-Closure Interlocks
    Publication number: 20090057315
    Abstract: An interlocking container end closure which permits a plurality of containers to be joined together and the contents thereof mixed.
    Type: Application
    Filed: August 27, 2007
    Publication date: March 5, 2009
    Inventors: Lisa P. Stringfield, Randal W. Stringfield