Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6139410 | Main body of grinding assembly for use in track rail joint grinding apparatus | Shinichi Okumura | 2000-10-31 |
| 5577954 | Grinding apparatus of welded residue on seam of rail head | Shinichi Okumura | 1996-11-26 |