Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5577528 | Apparatus for upgrade or repair of in-service pipelines | Gregory J. Drzewiecki, Chi Lei | 1996-11-26 |
| 5257644 | Hot tap cutter for plastic pipe | James E. Huebler | 1993-11-02 |
| 5146061 | Electrode for an electric discharge machining apparatus | James E. Huebler, John M. Arnold | 1992-09-08 |
| 4830041 | Reelable flow stopper for plugging fluid flow within a pipe | Dennis Sadowski | 1989-05-16 |