Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818199 | Spiral displacement machine for compressible media with embossed sheet metal seal strip | Klaus-Dieter Emmenthal, Claus Muller | 1989-04-04 |
OS
Otto Schafer
Overall (1989): #71,722 of 140,708Top 55%
1
Patents 1989