Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6428743 | Trough having an erosion-resistant precast shape | George M. Stoupis, Jeffrey S. Chadwick | 2002-08-06 |
| D348476 | Snare drum practice pad | — | 1994-07-05 |
| 4824099 | Rotating amusement device | Robert T. Rusu, Walter C. Cadwallader, Michael de Champlain, Ulf Ottho | 1989-04-25 |