Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5261394 | Percussive aid for the treatment of chronic lung disease | James C. Mulligan, David P. Colvin, Virginia S. Colvin, Benjamin T. Gravely, Charles J. Lord +2 more | 1993-11-16 |
| 4778172 | Animal head | — | 1988-10-18 |