Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5357389 | Alumina material useful with thin film heads | David P. Maddex, Richard F. Shimek | 1994-10-18 |
| 5256266 | Alumina material useful with thin film heads | David P. Maddex, Richard F. Shimek | 1993-10-26 |