Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4422990 | Method and apparatus for making soil plugs | Errol C. Armstrong, William A. Hanacek, Paul F. Hermann | 1983-12-27 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4422990 | Method and apparatus for making soil plugs | Errol C. Armstrong, William A. Hanacek, Paul F. Hermann | 1983-12-27 |