Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4307871 | Apparatus for automatically punching the tuyeres of a converter | Masaki Aizawa, Osamu Isshiki, Shigetoshi Maeda | 1981-12-29 |
| 4281821 | Method of controlling the suction gas pressure of a sulfuric acid plant for treatment of smelter exhaust gas | Masayuki Kawazoe, Atsuo Sasaki, Isao Kaneko | 1981-08-04 |