Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5678975 | Waste container throw-in system for buildings | Yonosuke Okabe | 1997-10-21 |
| 5155976 | Conveyor system of dust containers used in tall buildings | Younosuke Okabe, Tadashi Suzuki | 1992-10-20 |