Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8677519 | Drainage connector | Takamasa INA, Yasuhiro Kondo, Keisuke Hirai, Ken Hirabayashi, Ken Higuchi | 2014-03-25 |
| 8595868 | Air suction device for toilet drain passage | Ken Higuchi | 2013-12-03 |