Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331998 | Circuit interrupter with digital trip unit and style designator circuit | Emroy W. Lange, Joseph C. Engel, Bernard Mercier | 1982-05-25 |
| 4331996 | Time delayed undervoltage relay | Raymond O. D. Whitt, Roy W. Lange | 1982-05-25 |
| 4210887 | Circuit interrupter with interlocked interchangeable trip unit | Robert H. Hill, Paul Skalka, Alfred E. Maier | 1980-07-01 |
| 4181922 | Circuit interrupter with improved adjustable trip unit | Alan B. Shimp, Paul Skalka | 1980-01-01 |
| 4181906 | Circuit interrupter with interlocked removable trip unit | Emroy W. Lange, Paul Skalka | 1980-01-01 |