Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5039137 | Soil pipe coupling | Mitchell M. Cankovic, Bernard Doyle | 1991-08-13 |
| 4538837 | Anti-corrosion pipe apparatus | — | 1985-09-03 |
| 4273467 | Adjustable manhole cover support | — | 1981-06-16 |
| 4186948 | Pipe joint clamp | — | 1980-02-05 |