Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D353415 | Double-sided puzzle | — | 1994-12-13 |
| 5368301 | Double sized puzzle | — | 1994-11-29 |
| 5143871 | Clay bodies of china and ball clays containing heat treated clay combined with raw clay components | Samuel Mark Leese | 1992-09-01 |