Patents by Inventor Roger W. DeGreef

Roger W. DeGreef 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).

  • Automated mobile sandbag unit
    Patent number: 5957172
    Abstract: A sandbag filling machine generally comprises a plurality of sandbag carriers movably around a circuit by an indexing machine. The sandbag carriers are moved among a plurality of stations including a sand supply unit and a sandbag sealer. Fasteners on each sandbag carrier selectively open and close the sandbag.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: September 28, 1999
    Inventors: Roger W. DeGreef, Richard L. DeGreef