Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852075 | Erasable optical data storage medium and method and apparatus for recording data on the medium | Clyde D. Feyrer, N. Ross Gordon | 1989-07-25 |
| 4825430 | Erasable optical data storage medium having an embedded servo track and a subsurface recording interface | Joseph M. Halter, John S. Hartman, Michael A. Lind, John W. Swanson, Jonathan R. Biles | 1989-04-25 |