Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4389044 | Mechanical punching apparatus for copper smelting converter | Masao Fujita, Nobuhiro Higashiiriki | 1983-06-21 |
| 4353530 | Method and apparatus for automatically punching the tuyeres of a converter | Masao Fujita, Nobuhiro Higashiiriki | 1982-10-12 |
| 4303229 | Mechanical punching device for punching the tuyeres of a converter | Masao Fujita, Nobuhiro Higashiiriki | 1981-12-01 |