Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5559719 | Digitally controlled circuit interrupter with improved automatic selection of sampling interval for 50 Hz and 60 Hz power systems | Richard A. Johnson, Joseph C. Engel, Gary F. Saletta | 1996-09-24 |
| 5483408 | Overcurrent trip unit with separately adjustable neutral protection | Joseph J. Matsko, Joseph C. Engel | 1996-01-09 |
| 5428495 | Electrical switching apparatus with digital trip unit and automatic frequency selection | William J. Murphy, Joseph C. Engel, Gary F. Saletta | 1995-06-27 |
| 5331501 | Electrical switching apparatus with digital trip unit and memory reset | — | 1994-07-19 |
| 5105326 | Circuit for controlling the orientation of a magnetic field | James I. Wise | 1992-04-14 |
| 4939491 | Combination barrier and auxiliary CT board | Gregg J. Nissly, Lance Gula | 1990-07-03 |
| 4870532 | Electric circuit for operating trip circuit of a circuit breaker | William E. Beatty, Jr. | 1989-09-26 |
| 4639701 | Circuit breaker with interface flux shunt trip | — | 1987-01-27 |
| 4634981 | Method for testing a circuit breaker using a three terminal current transformer | Derek A. Paice | 1987-01-06 |
| 4603313 | Circuit breaker with replaceable rating plug interlock and push to trip button | William E. Beatty, Jr. | 1986-07-29 |
| 4358810 | Circuit breaker with alarm | John A. Wafer, William E. Beatty, Jr. | 1982-11-09 |
| 4298852 | Circuit breaker with interchangeable rating adjuster and interlock means | Alfred E. Maier, David J. Uram | 1981-11-03 |
| 4296450 | Discriminating circuit breaker protection system direct current power distribution systems | Derek A. Paice | 1981-10-20 |
| 4279007 | Single-phase fault detecting circuit breaker | — | 1981-07-14 |
| 4258403 | Ground fault circuit interrupter | — | 1981-03-24 |
| 4205361 | Undervoltage control apparatus for circuit interrupter | — | 1980-05-27 |
| 4181922 | Circuit interrupter with improved adjustable trip unit | Joseph J. Matsko, Paul Skalka | 1980-01-01 |