Issued Patents All Time
Showing 26–50 of 82 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5726577 | Apparatus for detecting and responding to series arcs in AC electrical systems | Raymond W. Mackenzie | 1998-03-10 |
| 5691869 | Low cost apparatus for detecting arcing faults and circuit breaker incorporating same | Raymond W. Mackenzie | 1997-11-25 |
| 5627716 | Overcurrent protection device | James L. Lagree, Harry W. Wargo, Anthony Tomeo | 1997-05-06 |
| 5627718 | Apparatus providing protection and metering in an ac electrical system utilizing a multi-function sampling technique | Gary F. Saletta, Richard A. Johnson | 1997-05-06 |
| 5600527 | Circuit interrupter providing protection and waveform capture for harmonic analysis | Gary F. Saletta, Richard A. Johnson | 1997-02-04 |
| 5596473 | Electrical switches with current protection interfaced with a remote station and a portable local unit | Richard A. Johnson, Michael F. Boccabella, David M. Oravetz, James I. Wise | 1997-01-21 |
| 5579194 | Motor starter with dual-slope integrator | Raymond W. Mackenzie | 1996-11-26 |
| 5559719 | Digitally controlled circuit interrupter with improved automatic selection of sampling interval for 50 Hz and 60 Hz power systems | Richard A. Johnson, Gary F. Saletta, Alan B. Shimp | 1996-09-24 |
| 5544065 | Apparatus for digitizing ac signals of unknown or changing frequency | Thomas J. Kenny | 1996-08-06 |
| 5483408 | Overcurrent trip unit with separately adjustable neutral protection | Joseph J. Matsko, Alan B. Shimp | 1996-01-09 |
| 5428495 | Electrical switching apparatus with digital trip unit and automatic frequency selection | William J. Murphy, Alan B. Shimp, Gary F. Saletta | 1995-06-27 |
| 5420799 | Circuit breaker - associated backpack unit for lower-link communication with a PC computer monitoring system and energy monitoring system using a plurality of such backpack units | Clyde O. Peterson, Denis A. Mueller, Richard B. Bell, Robert L. Cather | 1995-05-30 |
| 5420740 | Ground fault circuit interrupter with immunity to wide band noise | Raymond W. Mackenzie | 1995-05-30 |
| 5418677 | Thermal modeling of overcurrent trip during power loss | — | 1995-05-23 |
| 5384712 | Energy monitoring system for a plurality of local stations with snapshot polling from a central station | David M. Oravetz, Robert T. Elms, Frank Klancher, Thomas J. Kenny | 1995-01-24 |
| 5325315 | Process for auto calibration of a microprocessor based overcurrent protective device and apparatus | Gary F. Saletta, Marlan L. Winter, Edward C. Prather | 1994-06-28 |
| 5315531 | Energy monitoring system for a plurality of local stations with snapshot polling from a central station | David M. Oravetz, Robert T. Elms, Frank Klancher, Thomas J. Kenny | 1994-05-24 |
| 5270898 | Sure chip plus | Robert T. Elms, John C. Schlotterer, William J. Murphy | 1993-12-14 |
| 5224006 | Electronic circuit breaker with protection against sputtering arc faults and ground faults | Raymond W. Mackenzie | 1993-06-29 |
| 5060166 | Method and apparatus for rapidly analyzing AC waveforms containing DC offsets | Deborah K. Mort | 1991-10-22 |
| 5017859 | Integral capacitive divider bus bar voltage measuring apparatus and combined current sensor | Denis A. Mueller, Allan I. Bennett | 1991-05-21 |
| 4980794 | Electromagnetic contactor with lightweight wide range current transducer with sintered powdered metal core | — | 1990-12-25 |
| 4956741 | Solid-state trip unit for DC circuit breakers | William J. Murphy | 1990-09-11 |
| 4912522 | Light driven remote system and power supply therefor | Robert M. Oates, Leonard C. Vercellotti, J. Richard Hansen | 1990-03-27 |
| 4896105 | AC electric energy meter having drive circuit including stepper motor for driving mechanical register | Robert T. Elms | 1990-01-23 |