Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6392422 | Monitoring insulation and fault current in an A/C current network to provide load shutoff whenever differential current exceeds a certain response value | Michael Kammer, Dieter Hackl | 2002-05-21 |
| 5426912 | Magnetic cap guide | Nick Hall | 1995-06-27 |
| 4472676 | Leakage impedance measuring system including a superimposed measuring voltage having a frequency differing slightly from system frequency | Arno Eichmann | 1984-09-18 |