Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5134601 | Optical disk sector servo patterns | David W. Greenwell | 1992-07-28 |
| 4488188 | Buried servo recording system using phase encoded servo pattern | Neils H. Hansen | 1984-12-11 |
| 4318141 | Buried servo recording systems and methods | — | 1982-03-02 |
| 4314289 | Biased pulsed recording systems and methods | — | 1982-02-02 |
| 4287540 | Stabilized recording | Samuel D. Cheatham | 1981-09-01 |