Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10745263 | Container fill level indication system using a machine learning algorithm | Jason Bryan Young, Clay Hopf | 2020-08-18 |
| 10746586 | Tank-in-tank container fill level indicator | — | 2020-08-18 |
| 8514072 | Universal RF wireless sensor interface | William L. Keith, Andrew Brown | 2013-08-20 |
| 8049434 | Lighting commissioning device and method | Ling Wang, William L. Keith, James Cai | 2011-11-01 |
| 8035308 | Software controlled electronic dimming ballast | William L. Keith, George Grouev | 2011-10-11 |
| 7851737 | System and method for charging a control device from a lighting system | Ling Wang, William L. Keith | 2010-12-14 |
| 7589472 | Electronic ballast with lamp type determination | William L. Keith, George Grouev | 2009-09-15 |
| 7521876 | Electronic ballast with lamp type determination | William L. Keith, George Grouev | 2009-04-21 |
| 7443113 | Software controlled electronic dimming ballast | William L. Keith, George Grouev | 2008-10-28 |
| 6720741 | Electronic ballast having open circuit in output | Gueorgui L. Grouev, William L. Keith, Jacek Cachel | 2004-04-13 |
| 6333605 | Light modulating electronic ballast | Gueorgui L. Grouev, Donald Huvaere, William L. Keith | 2001-12-25 |
| 6111365 | Fast starting, surge limited, electronic ballast | Grigoriy Mirskiy, Michael W. Bandel, Peter W. Shackle | 2000-08-29 |
| 6091199 | Heat spreader for electronic ballast | James Neal Van Pelt | 2000-07-18 |
| 6023132 | Electronic ballast deriving auxilliary power from lamp output | Peter W. Shackle, Patrick J. Keegan, Ronald J. Bezdon | 2000-02-08 |
| 5982113 | Electronic ballast producing voltage having trapezoidal envelope for instant start lamps | Peter W. Shackle, Patrick J. Keegan, Ronald J. Bezdon | 1999-11-09 |
| 5973455 | Electronic ballast with filament cut-out | Grigoriy Mirskiy, William L. Keith, Peter W. Shackle, Patrick J. Keegan, Ronald J. Bezdon | 1999-10-26 |
| 5936357 | Electronic ballast that manages switching frequencies for extrinsic purposes | Patrick J. Keegan, Ronald J. Bezdon | 1999-08-10 |
| 5925990 | Microprocessor controlled electronic ballast | Ronald J. Bezdon, Michael W. Bandel, Patrick J. Keegan, Boyko Boykov, Peter W. Shackle +1 more | 1999-07-20 |
| 5747941 | Electronic ballast that monitors direct current through lamp filaments | Peter W. Shackle, Randy G. Russell, Ronald J. Bezdon | 1998-05-05 |
| 5539281 | Externally dimmable electronic ballast | Peter W. Shackle, Randy G. Russell, Ronald J. Bezdon | 1996-07-23 |
| 5500576 | Low height ballast for fluorescent lamps | Randy G. Russell, Peter W. Shackle, Ronald J. Bezdon | 1996-03-19 |
| 5493181 | Capacitive lamp out detector | Peter W. Shackle, Randy G. Russell | 1996-02-20 |
| 5461287 | Booster driven inverter ballast employing the output from the inverter to trigger the booster | Randy G. Russell, Peter W. Shackle | 1995-10-24 |
| 5440475 | Electronic Ballast with low harmonic distortion | Randy G. Russell | 1995-08-08 |
| 5434477 | Circuit for powering a fluorescent lamp having a transistor common to both inverter and the boost converter and method for operating such a circuit | John G. Konopka | 1995-07-18 |