Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5410148 | Safety switch system with photooptical and capacitance detection | Tan-Cheng Chou, Staton Williams, Darrin Kohn | 1995-04-25 |
| 5243183 | Obstruction position detecting system with comparison and memory means | Darrin Kohn | 1993-09-07 |
| 5077467 | Photoelectric switch and relay system with disabling fail-safe monitoring circuitry | Staton Williams | 1991-12-31 |