Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4595219 | Gas tightly sealed joint in oil field tubular goods | Friedrich Lenze | 1986-06-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4595219 | Gas tightly sealed joint in oil field tubular goods | Friedrich Lenze | 1986-06-17 |