Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4799421 | Hydrodynamic spiral-grooved journal bearing for electromagnetically rotated and reciprocated compressor piston | Fridtjof Bremer | 1989-01-24 |
EM
Everhardus A. Muijderman
Overall (1989): #115,773 of 140,708Top 85%
1
Patents 1989