Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5145174 | "Non-visual labyrinth puzzle ""Hidden Crazy Maze""" | — | 1992-09-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5145174 | "Non-visual labyrinth puzzle ""Hidden Crazy Maze""" | — | 1992-09-08 |