Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8197526 | Warming tool | Yoshiaki Kumamoto, Masataka Ishikawa | 2012-06-12 |
| 7353820 | Warming device | Yoshiaki Kumamoto, Masataka Ishikawa, Christine Hall, Jill Kathleen Lynch | 2008-04-08 |
| 6974470 | Heat-generative, steam generation sheet for face | Satoshi Tsunakawa, Conni Weaver, Masataka Ishikawa, Yoshiaki Kumamoto, Haruyo Kojima | 2005-12-13 |
| 6500201 | Heater | Masaru Tsuchiya, Takashi Ito, Akira Shiga, Hiroaki Kobayashi, Masamichi Shigekane +2 more | 2002-12-31 |