Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4413646 | Streamline coal slurry letdown valve | Edward A. Shadbolt | 1983-11-08 |
| 4383553 | Visbreaker letdown valve | — | 1983-05-17 |
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4413646 | Streamline coal slurry letdown valve | Edward A. Shadbolt | 1983-11-08 |
| 4383553 | Visbreaker letdown valve | — | 1983-05-17 |