Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D885536 | Lavatory pan | Daisuke Matsumoto, Takumi Masuda, Kenya Hara | 2020-05-26 |
| D884848 | Urinal | Daisuke Matsumoto, Kenya Hara | 2020-05-19 |
| D870866 | Lavatory pan | Daisuke Matsumoto | 2019-12-24 |
| D594945 | Toilet seat with bidet | Nami Nakasaki, Teiji Kawai | 2009-06-23 |
| D594536 | Toilet seat with bidet | Teiji Kawai | 2009-06-16 |
| D500845 | Bidet toilet seat unit | Takashi Yamanaka, Hisaaki Minezawa, Touitirou Matsuura | 2005-01-11 |
| D496990 | Bidet toilet seat unit | Takashi Yamanaka, Hisaaki Minezawa, Takashi Honda | 2004-10-05 |
| D495794 | Bidet toilet seat unit | Takashi Yamanaka, Hisaaki Minezawa, Takashi Honda | 2004-09-07 |