Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4306828 | Combined flow control and isolation valve | Romain Frieden | 1981-12-22 |
| 4290067 | Radiant energy profilometer | Victor Kremer | 1981-09-15 |
| 4277273 | Treatment and handling of metallurgical slag | Carlo Heinz | 1981-07-07 |
| 4273492 | Charging device for shaft furnaces | Pierre Mailliet | 1981-06-16 |
| 4253485 | Valve for opening and closing a fluid conduit | — | 1981-03-03 |
| 4243351 | Method of and apparatus for charging a furnace | Rene N. Mahr, Pierre Mailliet | 1981-01-06 |