Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5559064 | Chrome-free brick | Hiroaki Osaki, Hisato Okamoto, Tetsuo Yamamoto | 1996-09-24 |
| 4676412 | Refractory nozzles used around ladle and tundish | Osamu Shimobayashi, Hisahiro Hattori | 1987-06-30 |