Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6488785 | Surface treated steel material | Masato Yamashita, Atsumu Kanda, Hiroshi Ono | 2002-12-03 |
| 6342554 | Surface treatment agent for steel material | Masato Yamashita, Atsumu Kanda, Hiroshi Ono | 2002-01-29 |