Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5155976 | Conveyor system of dust containers used in tall buildings | Takao Sekigawa, Tadashi Suzuki | 1992-10-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5155976 | Conveyor system of dust containers used in tall buildings | Takao Sekigawa, Tadashi Suzuki | 1992-10-20 |