Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7875785 | Instructional device and method for piano or other musical keyboard | — | 2011-01-25 |
| 7875786 | Instructional device and method for guitar or other stringed instrument | — | 2011-01-25 |
| 7619154 | Instructional device and method for piano or other musical keyboard | — | 2009-11-17 |
| 5266220 | Method for melting contaminated snow and washing solids held therein | Patrick L. Severin, William C. Drake | 1993-11-30 |