Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5301919 | Sprinkler valve | — | 1994-04-12 |
| 5195718 | Sprinkler valve | — | 1993-03-23 |
| 5161761 | Telescoping device mounting stand with mechanical memory and internal wiring | — | 1992-11-10 |
| 4691611 | Electronic percussion instrument | — | 1987-09-08 |
| 4465908 | Hand controller | William M. Griffith, David D. Thornburg | 1984-08-14 |
| 4458114 | Hand controller spring | — | 1984-07-03 |