Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349948 | Method for manufacturing metal casings for accessories and particularly gate valves | Erwin Muller, Ferdinand Sonnabend, Gert Petzolt, Josef Balz, Bernhard Walloschek +1 more | 1982-09-21 |
| 4319736 | Apparatus and method for manufacturing a metal casing particularly for gate valves used in nuclear reactors and the like, having a large nominal width and a casing manufactured in accordance with the method | Erwin Muller, Ferdinand Sonnabend, Gert Petzolt, Josef Balz, Bernhard Walloschek +1 more | 1982-03-16 |