Patents by Inventor Steven John Massman

Steven John Massman 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).

  • Dart
    Patent number: 7871344
    Abstract: A dart with a dart tip and a cylindrical body. The tail end of the dart is smoothly contoured to promote end-over-end tumbling of the dart as it is thrown towards the dart board.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: January 18, 2011
    Inventor: Steven John Massman