Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4656719 | Method of preparing bimetallic tubes for roll-forming ribs | Janusz Przybyla, Zygmunt Gozdziewicz, Andrzej Szal, Andrzej Maczynski | 1987-04-14 |
| 4612790 | Method of drawing ribs on tubes | Janusz Przybyla, Zygmunt Gozdziewicz, Andrzej Szal, Andrzej Maczynski | 1986-09-23 |
| 4612791 | Method and apparatus for rolling transversely ribbed bimetallic pipes | Janusz Przybyla, Zygmunt Gozdziewicz, Andrzej Szal, Andrzej Maczynski | 1986-09-23 |