Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4415844 | Digital motor speed controller | Michael D. Buckert | 1983-11-15 |
| 4268905 | Autonomous fault diagnosis for disk drive using an internal microprocessor | Donald F. Johann | 1981-05-19 |
| 4233666 | Drive power sequencing | Per-Erik Walberg, Donald F. Johann | 1980-11-11 |
| 4200845 | Phase comparator with dual phase detectors | Randall L. Sandusky | 1980-04-29 |
| 4189784 | Adaptive circuit for extracting timing information from a repetitive series of time coherent pulses | — | 1980-02-19 |