Issued Patents 1997
Showing 1–1 of 1 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 | Ralf Bochert, Herbert Damsohn, Werner Helms, Roland Hemminger, Herbert Hunzelmann +3 more | 1997-09-23 |