Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5458766 | Life indicator and cartridge for indicating total water flow | Tadashi Okutoh, Aya Nishino, Shigeru Sano | 1995-10-17 |
| 5090232 | Method and apparatus for detecting odors | Yasusuke Wakabayashi, Takeo Koizumi, Masataka Hara, Masahiro Ehara | 1992-02-25 |
| 4770027 | Method of measuring concentrations of odors and a device therefor | Takeo Koizumi, Yasusuke Wakabayashi | 1988-09-13 |