| 3231253 | Apparatus for producing more than one grade of malleable iron from a single high carbon charge thereof | |||
| 2811435 | Treatment of fumes in steelmaking operations | |||
| 2192885 | Blast furnace power system | |||
| 2034071 | Metallurgical furnace | |||
| 0780651 | N/A | |||
| 0675329 | N/A | |||
| 0328042 | N/A | |||
| 0145843 | N/A |
| GB189807287A |