Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4825430 | Erasable optical data storage medium having an embedded servo track and a subsurface recording interface | John S. Hartman, Michael A. Lind, W. Eugene Skiens, John W. Swanson, Jonathan R. Biles | 1989-04-25 |