Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5669440 | Heat exchanger having a welded pipe which has a reduced wall thickness at location of the weld seam | Dieter Bauer, Ralf Bochert, Herbert Damsohn, Roland Hemminger, Herbert Hunzelmann +3 more | 1997-09-23 |
| 5640879 | Method and device for expanding metal tubes | Herbert Damsohn, Roland Hemminger, Walter Wolf | 1997-06-24 |