Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882236 | Rigid magnetic recording disks and method of producing same | Sheldon H. Butt, Eugene Shapiro | 1989-11-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882236 | Rigid magnetic recording disks and method of producing same | Sheldon H. Butt, Eugene Shapiro | 1989-11-21 |