Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5108100 | Pyramid puzzle formed from tetrahedral and octaeder pieces connected by a strand | Jan Essebaggers | 1992-04-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5108100 | Pyramid puzzle formed from tetrahedral and octaeder pieces connected by a strand | Jan Essebaggers | 1992-04-28 |