Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665532 | Black and white paper with variable gradation | Manfred Peters, Hans Ohlschlager, Bruno Mucke | 1997-09-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665532 | Black and white paper with variable gradation | Manfred Peters, Hans Ohlschlager, Bruno Mucke | 1997-09-09 |