Patents by Inventor David A. Schellhammer

David A. Schellhammer 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).

  • Archery arrows
    Patent number: 5234220
    Abstract: Arrows comprising a shaft having its original orientation through the die in which it was prepared marked or otherwise indicated. Any suitable marking or other indication can be used. The arrows may be pre-grouped and bundled. The shaft may be prepared with any suitable process including extrusion and pultrusion.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: August 10, 1993
    Assignee: Morrison Molded Fiber Glass Company
    Inventors: David A. Schellhammer, Frank J. Pearson