Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32831 | Apparatus for sealing a well casing | John O. Wambaugh, Joachim Hoppe | 1989-01-17 |
CS
Clinton O. Shonrock
Overall (1989): #124,723 of 140,708Top 90%
1
Patents 1989