Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4487525 | Propulsion pipe laying system | Toshikazu Yamamuro, Hiroshi Saito | 1984-12-11 |
| 4486124 | Pipe laying method and apparatus | Toshikazu Yamamuro, Hiroshi Saito | 1984-12-04 |