Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33171 | Hydraulic elevator | Tsuyoshi Ogasawara, Ken Ichiryu, Ichiro Nakamura | 1990-02-27 |
| 4534452 | Hydraulic elevator | Tsuyoshi Ogasawara, Ken Ichiryu, Ichiro Nakamura | 1985-08-13 |