Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4817859 | Method of joining nodular cast iron to steel by means of fusion welding | Georg Breitenmoser | 1989-04-04 |
| 4812107 | Method of manufacturing a control wheel for the high-pressure rotor of a steam turbine | Santino Barcella, Manfred Befeld, Paul Slepcevic | 1989-03-14 |