Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6188552 | High resistance grounding systems for oil well electrical systems | William E. Berkopec, David Shipp, Martin Baier | 2001-02-13 |
| 5951276 | Electrically enhanced hot surface igniter | Gordon B. Spellman | 1999-09-14 |
| 5890282 | Making an integrated control and panel assembly | Denis J. Leveque | 1999-04-06 |
| 5512810 | Variable speed control for a hand-held electric power tool | James E. Hansen, Jeffery L. Henderson | 1996-04-30 |
| 5301083 | Remote control residential circuit breaker | William E. Grass, Peter K. Moldovan, Earl T. Piber, Robert J. Clarey, Robert A. Kihn +2 more | 1994-04-05 |
| 5294839 | Soft start AC tool handle trigger switch circuit | — | 1994-03-15 |
| 4642481 | Solid state hybrid switch | Ralph F. Bielinski, Slobodan Krstic, Earl T. Piber, Peter J. Theisen | 1987-02-10 |
| 4480201 | Dual mode power transistor | — | 1984-10-30 |
| RE31579 | Shutterless fiber optic switch | — | 1984-05-01 |
| 4429339 | AC Transistor switch with overcurrent protection | Walter L. Rutchik | 1984-01-31 |
| 4345292 | Minimum size, integral, A.C. overload current sensing, remote power controller | Walter L. Rutchik | 1982-08-17 |
| 4305259 | Frost sensor employing self-heating thermistor as sensor element | — | 1981-12-15 |
| 4295058 | Radiant energy activated semiconductor switch | Robert W. Lade, Gordon B. Spellman, Stanley V. Jaskolski, Herman P. Schutten | 1981-10-13 |
| 4223217 | Fiber optic electric switch | James A. Bongard, Eugene F. Duncan | 1980-09-16 |