Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32831 | Apparatus for sealing a well casing | John O. Wambaugh, Joachim Hoppe | 1989-01-17 |
| 4554973 | Apparatus for sealing a well casing | John O. Wambaugh | 1985-11-26 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32831 | Apparatus for sealing a well casing | John O. Wambaugh, Joachim Hoppe | 1989-01-17 |
| 4554973 | Apparatus for sealing a well casing | John O. Wambaugh | 1985-11-26 |