Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6698377 | Whistle | Michael C. Sharp | 2004-03-02 |
| 6416379 | Whistle | — | 2002-07-09 |
| 6109202 | Combination whistle | Michael C. Sharp | 2000-08-29 |
| D409939 | Whistle | Michael C. Sharp | 1999-05-18 |