Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7494125 | Sliding tile puzzle with tile rotating mechanism | — | 2009-02-24 |
| 6126168 | Money counting game and apparatus | — | 2000-10-03 |
| 5785318 | Amusement device of shifting block type | — | 1998-07-28 |
| 5301981 | Copy preventing device and method | — | 1994-04-12 |
| 4865324 | Magnetic wheel puzzle | — | 1989-09-12 |