Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858034 | Modular unitary disk file subsystem with differing density zones | Michael J. Hassel, Ian Felix | 1989-08-15 |
| 4825321 | Modular unitary disk file subsystem having increased data storage capacity | Michael J. Hassel, Ian Felix | 1989-04-25 |