Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4962550 | Toilet with urine constituent measuring device | Takao Ikenaga, Toshifumi Shigematsu, Shigeru Makita, Hitoshi Kitaura | 1990-10-16 |
| 4961431 | Toilet device with health examination system | Takao Ikenaga, Toshifumi Shigematsu, Akio Kusumoto, Kimiyoshi Yamamoto | 1990-10-09 |