Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9679542 | Circular piano keyboard | Brockett Parsons, Charles E. Johnson, Richard Fell, James M. Behmke | 2017-06-13 |
| 8952232 | Circular piano keyboard | Brockett Parsons, Charles E. Johnson, Richard Fell, James M. Behmke | 2015-02-10 |