Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D312468 | Power shovel | Masao Masumoto, Kazuhiko Tsuji, Siro Sugiyama | 1990-11-27 |
| 4552503 | Excavating vehicle | Akihiko Mouri, Akira Tsuda, Masahiro Tsutsumi, Kazushige Ikeda | 1985-11-12 |