Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5932992 | Method for energizing energization-operated toy element and energization-operated toy | Tsutomu Tomatsu, Kyoji Aoyama, Nobuaki Matsunami, Tsutomu Kito | 1999-08-03 |
| 5716253 | Thermally color-changeable toy | Tadashi Aoki, Tsutomu Tomatsu, Kyoji Aoyama, Tsutomu Kito | 1998-02-10 |