Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831703 | Apparatus and method for plugging a tube | John J. Wilhelm, Kenneth D. Kolberg, William G. Cole | 1989-05-23 |
| 4799305 | Tube protection device | Michael Brunner | 1989-01-24 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831703 | Apparatus and method for plugging a tube | John J. Wilhelm, Kenneth D. Kolberg, William G. Cole | 1989-05-23 |
| 4799305 | Tube protection device | Michael Brunner | 1989-01-24 |