Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832586 | Drive assembly with different eccentricities | Claus Muller, Otto Schaafer | 1989-05-23 |
| 4818199 | Spiral displacement machine for compressible media with embossed sheet metal seal strip | Claus Muller, Otto Schafer | 1989-04-04 |