Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7466134 | Method and apparatus for locating underground cast iron pipe joints | — | 2008-12-16 |
| 6668665 | Gas level monitoring system and gas flow rate sensor used therein | Kenneth Roger Schimnowski, John W. Duffy, Richard J. Vanderah | 2003-12-30 |
| 6112137 | Adaptive system for predictive control of district pressure regulators | Christopher Ziolkowski | 2000-08-29 |
| 5999107 | Remote cathodic protection monitoring system | Joel Cooper, Albert W. Gershman, Arthur B. Shapiro, Christopher Ziolkowski | 1999-12-07 |