Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803143 | Colored single-component toners and their preparation | Werner Ostertag, Franz-Ulrich Schmitt, Detlef Schulze-Hagenest | 1989-02-07 |
EC
Erwin Czech
Overall (1989): #116,734 of 140,708Top 85%
1
Patents 1989