Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4425409 | Method of preparing a magnetic pigment of .gamma.-Fe.sub.2 O.sub.3 particles and recording element | Hendrikus F. Huisman | 1984-01-10 |
| 4349385 | Method of preparing a FeOOH pigment | Hendrikus F. Huisman | 1982-09-14 |