Issued Patents All Time
Showing 25 most recent of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9234914 | Apparatus to verify an electrically safe work condition | Roger Alan Plemmons | 2016-01-12 |
| 9013123 | Self protected dynamic braking | Gregory A. Helton, Roger Alan Plemmons | 2015-04-21 |
| 9001476 | Multimotor variable frequency overload | John Herman Blakely, Gregory A. Helton | 2015-04-07 |
| 8809698 | Housing-captured component carrier for reducing fasteners | John S. Clark, Michael G. Early | 2014-08-19 |
| 7907375 | Self powered electronic overload method and system | John Herman Blakely, Gregory A. Helton | 2011-03-15 |
| 7394629 | Motor overload tripping system and method with multi-function circuit interrupter | Roger Alan Plemmons, John Herman Blakely, Gregory A. Helton, Ricky A. Hurley | 2008-07-01 |
| 7019951 | Extended trip range motor control system and method | Roger Alan Plemmons, John Herman Blakely, Gregory A. Helton, Ricky A. Hurley | 2006-03-28 |
| 5815357 | Method and apparatus for three-phase sensing using two current transformers | John Herman Blakely | 1998-09-29 |
| 5815364 | Ultrasonic coil current regulator | Rick A. Hurley | 1998-09-29 |
| 5802329 | Devicenet address verification | Pamela S. Combs | 1998-09-01 |
| 5777835 | Third phase reconstruction from a two current transformer sensor with three-phase true RMS and phase loss determination capabilities | — | 1998-07-07 |
| 5774323 | Detection of contact position from coil current in electromagnetic switches having AC or DC operated coils | John Herman Blakely | 1998-06-30 |
| 5715129 | Electronic overload relay having intrinsic power supply operable from power applied to contactor coil | — | 1998-02-03 |
| 5706153 | Programmer for starter | Gregory A. Helton, Ralph Rosa, Lee Smith | 1998-01-06 |
| 5699222 | Apparatus and method for programming and reviewing a plurality of parameters of electrical switching device | — | 1997-12-16 |
| 5691871 | Test circuit for electrical switching device | — | 1997-11-25 |
| 5684342 | Starter with overload relay having power off cooling for multiple class loads | Michael G. Early | 1997-11-04 |
| 5652420 | Modular contactor control system | Nelson R. Palmer | 1997-07-29 |
| 5608311 | AC input for digital processor with capacitively coupled immunity and surge withstand | John Herman Blakely | 1997-03-04 |
| 5606299 | Modular surge suppressor | Nelson R. Palmer | 1997-02-25 |
| 5546268 | Electromagnetic device with current regulated closure characteristic | Rick A. Hurley, Nelson R. Palmer | 1996-08-13 |
| 5539608 | Electronic interlock for electromagnetic contactor | Rick A. Hurley, Parker A. Bollinger, Jr. | 1996-07-23 |
| 5519560 | Unity gain filter for current transformer | Nicholas G. Muskovac | 1996-05-21 |
| 5510949 | Duty cycle filtered trip signalling | — | 1996-04-23 |
| 5508875 | Self powered remote trip indicator | — | 1996-04-16 |