Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841052 | Naphthalic acid imides electrophotographic toners | Roderich Raue | 1989-06-20 |
| 4812379 | Electrophotographic toners containing an additive reinforcing the cationic charge | Roderich Raue | 1989-03-14 |