Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4985378 | Carbon-containing refractory and a manufacturing method therefor | Kenji Ichikawa, Noboru Tsukamoto, Yuji Yoshimura, Junichi Inoue | 1991-01-15 |
| 4830992 | Carbon containing refractory | Kenji Ichikawa, Noboru Tsukamoto, Hitoshi Iwado | 1989-05-16 |