Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D265548 | Packaging drum for food | Donald Freund | 1982-07-27 |
| 4305535 | Drum closure assembly | Donald Freund, Douglas G. Nelson | 1981-12-15 |
| 4252265 | Drum closure assembly | Donald Freund, Douglas G. Nelson | 1981-02-24 |