Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4308968 | Secondary seal for tank having floating roof | Roger W. Thiltgen, T. Richard Mathews | 1982-01-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4308968 | Secondary seal for tank having floating roof | Roger W. Thiltgen, T. Richard Mathews | 1982-01-05 |