Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4284385 | Method and equipment for handling pipe mounted carriage | Stephen K. Madden | 1981-08-18 |
| 4213357 | Cutting device for pipe jackets | Richard B. Gwin | 1980-07-22 |
| 4205774 | Device for welding tubes to pipe | Stephen Anthony Madden, Richard B. Gwin | 1980-06-03 |