Issued Patents All Time
Showing 25 most recent of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10139434 | Method and apparatus for measuring the stability of an alternating current distribution grid | David Watson, Charles McParland | 2018-11-27 |
| 10067167 | Method and apparatus for precision phasor measurements through a medium-voltage distribution transformer | Ronald Hofmann | 2018-09-04 |
| 9621569 | Method and apparatus for detecting cyber attacks on an alternating current power grid | Ronald Hofmann | 2017-04-11 |
| 9581618 | Method and apparatus for triggered capture of voltage phase angle data on an alternating current power grid | — | 2017-02-28 |
| 9383397 | System and method for measuring a parameter of an alternating current power grid while minimizing the likelihood of lightning damage in a measuring system | — | 2016-07-05 |
| 7511468 | Harmonics measurement instrument with in-situ calibration | Matthew Muh | 2009-03-31 |
| 6759765 | Sag generator with plurality of switch technologies | Barry Tangney | 2004-07-06 |
| 6285169 | Sag generator with switch-mode impedance | — | 2001-09-04 |
| 5789677 | Dual-axis force feedback accelerometer | — | 1998-08-04 |
| 5742153 | Coasting power supply for AC power system waveform measuring instrument | Bryan D. Hord | 1998-04-21 |
| 5680028 | Charger for hand-held rechargeable electric apparatus with reduced magnetic field | — | 1997-10-21 |
| 5581471 | Method and apparatus for storing electric power measurements | Richard Piehl | 1996-12-03 |
| 5536979 | Charger for hand-held rechargeable electric apparatus with switch for reduced magnetic field | Thomas B. Haverstock | 1996-07-16 |
| 5530738 | Electric power measuring instrument with speech synthesis feature | — | 1996-06-25 |
| 5526694 | Instrument for detecting hidden structural damage in multi-story buildings | Joseph Ungerer | 1996-06-18 |
| 5481468 | Method and apparatus for storing an increasing number of sequential real-time samples in a fixed amount of memory | — | 1996-01-02 |
| 5471401 | Waveform library for characterizing an AC power line spectrum | Jamie Nicholson | 1995-11-28 |
| 5408523 | Electronic remote data recorder with facsimile output for utility AC power systems | Scott Terry, Jamie Nicholson, Erich Günther | 1995-04-18 |
| 5347464 | High-pass filter for enhancing the resolution of AC power line harmonic measurements | Bryan D. Hord | 1994-09-13 |
| 5307009 | Harmonic-adjusted watt-hour meter | William A. Moncrief | 1994-04-26 |
| 5302890 | Harmonic-adjusted power factor meter | W. Mack Grady | 1994-04-12 |
| 5300924 | Harmonic measuring instrument for AC power systems with a time-based threshold means | Jamie Nicholson | 1994-04-05 |
| 5298885 | Harmonic measuring instrument for AC power systems with poly-phase threshold means | Jamie Nicholson | 1994-03-29 |
| 5298888 | Harmonic measuring instrument for AC power systems with latched indicator means | Jamie Nicholson | 1994-03-29 |
| 5298856 | Harmonic-adjusted power factor meter | W. Mack Grady | 1994-03-29 |