Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6690278 | Electronic marker for metallic valve box covers | Christopher Ziolkowski | 2004-02-10 |
| 5999107 | Remote cathodic protection monitoring system | Joel Cooper, Joe W. McCarty, Arthur B. Shapiro, Christopher Ziolkowski | 1999-12-07 |
| 5983736 | Method and apparatus for tracking the flow of liquids in a gas pipe | — | 1999-11-16 |