Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4586714 | Puzzle game | Roger J. Lenkoff, Patrick J. Garry | 1986-05-06 |
| 4514177 | Invisible ink quiz game | — | 1985-04-30 |
| 4212393 | Magic pictures | — | 1980-07-15 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4586714 | Puzzle game | Roger J. Lenkoff, Patrick J. Garry | 1986-05-06 |
| 4514177 | Invisible ink quiz game | — | 1985-04-30 |
| 4212393 | Magic pictures | — | 1980-07-15 |