Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7161077 | Gradually progressive bore BB-flat, CC, E-flat, F, or B-flat valved musical wind instrument and valved B-flat/F inverted double musical wind instrument | Robert C. Fry, William H. Sprague, Jr. | 2007-01-09 |