Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10914389 | High pressure detachable/retractable stopper plug | Jeffery W. Mainzer, Jim Diehl | 2021-02-09 |
| 9000778 | Communication method for monitoring pipelines | Christopher Ziolkowski, Michael C. Mensinger | 2015-04-07 |
| 8358120 | Non-intrusive detection of live electrical lines | — | 2013-01-22 |
| 8156810 | Method for identifying defective heat fusion joints | Maurice Givens | 2012-04-17 |
| 7938007 | Method for inspecting joined material interfaces | Maurice Givens | 2011-05-10 |
| 6725705 | Enhanced acoustic detection of gas leaks in underground gas pipelines | Christopher Ziolkowski | 2004-04-27 |
| 5257644 | Hot tap cutter for plastic pipe | Narayan C. Saha | 1993-11-02 |
| 5146061 | Electrode for an electric discharge machining apparatus | John M. Arnold, Narayan C. Saha | 1992-09-08 |
| 5127267 | Acoustic method for locating concealed pipe | Bruce Campbell | 1992-07-07 |
| 5027644 | Method and apparatus for injecting acoustic signals into live gas mains | Christopher Ziolkowski | 1991-07-02 |
| 4888706 | Fluid distribution to multiple users through distributed intelligence sub-centers | William F. Rush | 1989-12-19 |
| 4729106 | Fluid distribution to multiple users through distributed intelligence sub-centers | William F. Rush | 1988-03-01 |
| 4646787 | Pneumatic pipe inspection device | William F. Rush, Christopher Ziolkowski | 1987-03-03 |
| 4641377 | Photoacoustic speaker and method | William F. Rush, Peter Lysenko | 1987-02-03 |
| 4457162 | Multi-frequency photo-acoustic detector | William F. Rush | 1984-07-03 |
| 4455863 | Sonic detection of gas leaks in underground pipes | Jeffrey M. Craig | 1984-06-26 |