Patents by Inventor Frank E. Zumwalt

Frank E. Zumwalt 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).

  • Filing system
    Patent number: 5743036
    Abstract: A filing system having at least one file folder for holding documents. The file folder has at least one V-shaped notch along the top of the file folder which is designed to provide a location for the placement of identifying data such as alphabetical index information, bar codes and magnetic strips.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: April 28, 1998
    Inventor: Frank E. Zumwalt