Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5738339 | Rope traction device with connected locking units | — | 1998-04-14 |
| D388929 | Traction hoist used in a powered suspended scaffold | — | 1998-01-06 |
| D388928 | Traction hoist used in a powered suspended scaffold | — | 1998-01-06 |
| 5638756 | Rope traction device | — | 1997-06-17 |
| 5626081 | Rope traction device | — | 1997-05-06 |
| 5515790 | Rope traction device | — | 1996-05-14 |
| 4979589 | Work apparatus for a work on a wall surface | Yutaka Sugiyama | 1990-12-25 |