Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4792389 | Process to produce light products and fuel oils for conventional use from heavy metal- and sulfur-rich crude oil residues | Werner Frohn, Dieter Bohlmann, Hermann Franke, Werner Zimmermann, Heinz Limmer +6 more | 1988-12-20 |
| 4543170 | Method of producing accurately scaled, well-defined surfaces of work pieces from carbonaceous cast iron with tribologic properties | Klaus Heck | 1985-09-24 |
| 4504370 | Method and apparatus for electrochemical machining | Peter Ufer, Klaus Heck, Gerhard Schmoger | 1985-03-12 |
| 4483755 | Method for the treatment of surfaces of a workpiece of carbon-containing cast iron | Klaus Heck, Karl Linzenkirchner, Fritz Indra, Hans Munnighoff | 1984-11-20 |
| 4222430 | Method of armo-coating valve seats of internal combustion engines | — | 1980-09-16 |