Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6357747 | Eighteen-piece pro-tangram tiling puzzles | — | 2002-03-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6357747 | Eighteen-piece pro-tangram tiling puzzles | — | 2002-03-19 |