Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D283629 | Adjustable dater | Stephen Hewitt, Per-Arne Carlsson | 1986-04-29 |
| 4579057 | Stamper with rotatable cover | Stephen Hewitt, Per-Arne Carlsson | 1986-04-01 |
| D276818 | Office stamp | Per-Arne Carlsson | 1984-12-18 |