Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5347665 | Carbonate spring bath system | Naoki Kumon, Shin Matsugi, Hiroshi KANO, Noriyoshi Nakaoka, Shoichi Morii +4 more | 1994-09-20 |
| 4907305 | Bubbling bathtub system | Keiichi Teramachi, Naoki Kumon, Shinya Hirota, Hidehiko Kishie, Tsutomu Amaki +1 more | 1990-03-13 |