Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D277686 | Toy block | Yasushi Chatani | 1985-02-19 |
| D272255 | Toy block | Yasushi Chatani | 1984-01-17 |
| D272256 | Toy block | Yasushi Chatani | 1984-01-17 |
| D272167 | Toy block | Yasushi Chatani | 1984-01-10 |
| 4306373 | Interconnecting toy block arrangement | Yasushi Chatani | 1981-12-22 |