| 6327896 |
Photo-acoustic leak detection system |
William A. Veronesi, Richard A. Hart |
2001-12-11 |
| 6154307 |
Method and apparatus to diffract multiple beams |
William A. Veronesi, Richard A. Hart |
2000-11-28 |
| 6089076 |
System to control the power of a beam |
Eric R. Mueller, Richard A. Hart, William A. Veronesi |
2000-07-18 |
| 5834632 |
Photo-acoustic leak detector with multiple beams |
Bernard A. Woody, Leon A. Newman |
1998-11-10 |
| 5824884 |
Photo-acoustic leak detector with baseline measuring |
Bernard A. Woody, Leon A. Newman |
1998-10-20 |
| 5780724 |
Photo-acoustic leak detector with improved signal-to-noise response |
Bernard A. Woody, Leon A. Newman |
1998-07-14 |
| 5691700 |
Apparatus and method using non-contact light sensing with selective field of view, low input impedance, current-mode amplification and/or adjustable switching level |
Stephen K. Phelps, Martin F. Zabielski |
1997-11-25 |
