Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6667801 | Method and apparatus for safety testing optical systems for hazardous locations | Thomas H. Dubaniewicz | 2003-12-23 |
| 5838900 | Digital data processing methods and apparatus for fault detection and fault tolerance | Charles J. Horvath, William I. Leavitt, Mark D. Tetreault, Peter C. Churchill | 1998-11-17 |
| 5630056 | Digital data processing methods and apparatus for fault detection and fault tolerance | Charles J. Horvath, William I. Leavitt, Mark D. Tetreault, Peter C. Churchill | 1997-05-13 |
| 5586253 | Method and apparatus for validating I/O addresses in a fault-tolerant computer system | Steven Kohalmi, Karen R. Bricknell | 1996-12-17 |
| 4521935 | Vacuum spray head | Charles R. Johnston | 1985-06-11 |