Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4816979 | Circuit for regulating the high-voltage supply of an electrostatic filter | Helmut Domann, Karl-Heinz Hagele | 1989-03-28 |
HR
Hartmann Rupp
Overall (1989): #107,834 of 140,708Top 80%
1
Patents 1989