Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5626956 | Hexagonal magnetic ferrite pigment for high density magnetic recording applications | John S. Roden, Gunther H. Dierssen, Ronald S. Sapieszko | 1997-05-06 |
| 5616414 | Hexagonal magnetic ferrite pigment for high density magnetic recording applications | John S. Roden, Gunther H. Dierssen, Ronald S. Sapieszko | 1997-04-01 |