Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4942773 | Device for sampling steel material | Kaizo Okamoto, Akira Ichihara, Kenji Hirata, Katsuhisa Hirayama, Eiji Hina +4 more | 1990-07-24 |
| 4833930 | Method of sampling steel material and a device therefor | Kaizo Okamoto, Akira Ichihara, Kenji Hirata, Katsuhisa Hirayama, Eiji Hina +4 more | 1989-05-30 |
| 4301726 | Method of marking hot material | Tsuyoshi Tsuchida | 1981-11-24 |
| 4189130 | Blast-furnace tuyere | Hideto Watanabe, Shigeo Shoji, Takashi Oka | 1980-02-19 |