Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7359168 | Arc fault circuit interrupter and method for disabling series arc protection during current transients | Robert T. Elms | 2008-04-15 |
| 7307429 | Apparatus for testing an arc fault circuit interrupter | Dale L. Gass, Jerome K. Hastings | 2007-12-11 |
| 7268989 | Arc fault circuit interrupter for a compressor load | Robert T. Elms | 2007-09-11 |
| 7253640 | Arc fault detector and method for locating an arc fault | Joseph C. Engel, Engelbert Hetzmannseder, Peter J. Theisen, Joseph C. Zuercher | 2007-08-07 |
| 7253996 | Method and arc fault circuit interrupter employing a hysteresis value for compressor rumble | Robert T. Elms | 2007-08-07 |
| 6876532 | Circuit interrupter trip unit | Joseph C. Engel | 2005-04-05 |
| 6850073 | Power circuit tester apparatus and method | Robert T. Elms, Brendan Foley | 2005-02-01 |
| 6762920 | Electronic fault detector for variable frequency ac systems and circuit breaker incorporating same | — | 2004-07-13 |
| 6522509 | Arc fault detection in ac electric power systems | Joseph C. Engel | 2003-02-18 |
| 5574356 | Active neutral current compensator | — | 1996-11-12 |