Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8464744 | Water sensor with activation mechanism | — | 2013-06-18 |
| 7703740 | Clog resistant pilot valve | — | 2010-04-27 |
| 7082959 | Shutoff valve system with leak detector | — | 2006-08-01 |
| 6792967 | Shutoff valve system with leak detector | — | 2004-09-21 |
| 5240022 | Automatic shutoff valve | — | 1993-08-31 |
| 5193780 | Low friction ball valve | — | 1993-03-16 |
| 4942668 | Digital inclinometer | — | 1990-07-24 |
| 4827624 | Electronic level | Charles J. Stauss | 1989-05-09 |
| 4564795 | Motor speed control system | Christopher W. Parkes | 1986-01-14 |
| 4464622 | Electronic wall stud sensor | — | 1984-08-07 |
| 4464727 | Parabolic function generator | Christopher W. Parkes | 1984-08-07 |
| 4412279 | Switching regulator with transient reduction circuit | — | 1983-10-25 |
| 4322029 | Air driven centrifuge having a tachometer | Lee Gropper | 1982-03-30 |
| 4205261 | Ultracentrifuge overspeed disk detection system | — | 1980-05-27 |