Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5502967 | Color variation inducing device | Tsutomu Tomatsu, Yoshiaki Ono | 1996-04-02 |
| 5376772 | Electrothermal instrument with heat generating element of sintered BaTiO.sub.3 in contact with heat transmitting member | Yoshiaki Ono, Tsutomu Tomatsu, Takeo Yamaguchi | 1994-12-27 |
| 5316513 | Electrothermal color-varying device and toy utilizing the same | Yoshiaki Ono, Tsutomu Tomatsu, Takeo Yamaguchi, Kyoji Aoyama, Toshiaki Tanaka | 1994-05-31 |