Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880514 | Method of making a thin film magnetic disk | John C. Scott, Hudson Washburn, Nal T. Viswanathan | 1989-11-14 |
| 4861662 | Protective layer for magnetic disk | Robert J. Kobliska | 1989-08-29 |