Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5016754 | Collapsible ashtray | William F. Mann, Winthrop D. Allen, III | 1991-05-21 |
| D294979 | Ashtray | William F. Mann, Winthrop D. Allen, III | 1988-03-29 |
| 4577758 | Ashtray | William F. Mann, Winthrop D. Allen, III | 1986-03-25 |