Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7767874 | Medical device and process | Donald L. Kellogg | 2010-08-03 |
| 5033352 | Electronic musical instrument with frequency modulation | Steven L. Kellogg | 1991-07-23 |
| 4930390 | Automatic musical performance apparatus having separate level data storage | Steven L. Kellogg | 1990-06-05 |