Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4903944 | Valve assembly and method | James K. Butzen | 1990-02-27 |
| 4879847 | Cover for pneumatic tool | James K. Butzen, Robert D. Giese | 1989-11-14 |
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4903944 | Valve assembly and method | James K. Butzen | 1990-02-27 |
| 4879847 | Cover for pneumatic tool | James K. Butzen, Robert D. Giese | 1989-11-14 |