Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5995306 | Handling defective frames on hard sectored magnetic tape | John Contreras, Steven F. Hartung, Mark R. Ayres | 1999-11-30 |
| 5546246 | Magnetic tape drive with end-of-track block directory | Charles Klomp, Mark Ayers | 1996-08-13 |