Issued Patents 1982
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4346468 | High density information disc | Louis J. Hillenbrand, David A. Berry | 1982-08-24 |
| 4346469 | High density information disc | Louis J. Hillenbrand, David A. Berry | 1982-08-24 |
| 4342660 | High density information disc lubricants | David A. Berry, Louis J. Hillenbrand | 1982-08-03 |
| 4340629 | High density information disc | Louis J. Hillenbrand, David A. Berry | 1982-07-20 |
| 4327140 | High density information disc lubricants | — | 1982-04-27 |