Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11398794 | Variable frequency drive thermal management | Ismail Agirman | 2022-07-26 |
| 7041405 | Fuel cell voltage control | Tommy Skiba, David D. Jayne, Paul A. Grubb, Rishi Grover, Wesley E. Sedlacek, Jr. | 2006-05-09 |
| 6684055 | System for remotely communicating voice and data to and from an elevator controller | Barry G. Blackaby | 2004-01-27 |
| 6147620 | Remote monitoring of elevator cab lights | Barry G. Blackaby, William A. Wurts, William C. Rogers | 2000-11-14 |
| 5931264 | Rail survey unit | Geoffrey W. Gillingham, Francis J. Griffiths | 1999-08-03 |
| 5889239 | Method for monitoring elevator leveling performance with improved accuracy | Barry G. Blackaby, William A. Wurts | 1999-03-30 |
| 5866861 | Elevator active guidance system having a model-based multi-input multi-output controller | Rajesh Rajamani, Randall Keith Roberts | 1999-02-02 |
| 5814774 | Elevator system having a force-estimation or position-scheduled current command controller | Randall Keith Roberts, Rajesh Rajamani, Roy S. Colby | 1998-09-29 |
| 5652414 | Elevator active guidance system having a coordinated controller | Randall Keith Roberts, Clement A. Skalski | 1997-07-29 |
| 5242007 | X-ray detection of residual ceramic material inside hollow metal articles | David R. Judd, Gerald S. Golden | 1993-09-07 |
| 5070722 | Turbine engine debris ingestion monitor | Michael W. Hawman, Thomas M. Ritter | 1991-12-10 |