Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4680068 | Method for forming drum handling rings | Donald R. Hofstetter | 1987-07-14 |
| 4626186 | Apparatus for forming drum handling rings | Don R. Hofstetter, Sr. | 1986-12-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4680068 | Method for forming drum handling rings | Donald R. Hofstetter | 1987-07-14 |
| 4626186 | Apparatus for forming drum handling rings | Don R. Hofstetter, Sr. | 1986-12-02 |