Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4268043 | Sealing member for use in well shafts | — | 1981-05-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4268043 | Sealing member for use in well shafts | — | 1981-05-19 |