Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5094730 | Method for forming a metallic coating on steel pipes | Norbert Niehaus, Wilhelm Schwenk | 1992-03-10 |
| 4513995 | Method for electrolytically tin plating articles | Norbert Niehaus, Wilhelm Schwenk | 1985-04-30 |