Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5142740 | Toilet covering hinge assembly | Tsutomu Okumoto | 1992-09-01 |
| 4907305 | Bubbling bathtub system | Keiichi Teramachi, Harue Kawagoe, Naoki Kumon, Shinya Hirota, Hidehiko Kishie +1 more | 1990-03-13 |