Patents by Inventor Joel L. Schaffer

Joel L. Schaffer 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).

  • Beverage can stopper
    Patent number: 4915252
    Abstract: A stopper seals the opening left in the lid of a metal can upon operation of an integral metal tab that is attached to the top surface of the lid. The stopper comprises a resilient plug having a thickness greater than the thickness of the lid.
    Type: Grant
    Filed: March 28, 1989
    Date of Patent: April 10, 1990
    Inventor: Joel L. Schaffer