Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6468088 | Solid having reversibly invisible/visible thermochromic construction enclosed therein | Katsuyuki Fujita, Tsutomu Tomatsu | 2002-10-22 |
| 5932992 | Method for energizing energization-operated toy element and energization-operated toy | Tsutomu Tomatsu, Kyoji Aoyama, Naomasa Miyashita, Tsutomu Kito | 1999-08-03 |
| 5219625 | Thermochromic laminate member and toy utilizing the same | Hiroshi Inagaki | 1993-06-15 |
| 4732810 | Reversible temperature-indicating composition | Tsutomu Kito, Norikazu Nakasuji, Takashi Kataoka, Hiroshi Inagaki, Yutaka Shibahashi | 1988-03-22 |