Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36202 | Disk spindle motor | — | 1999-04-27 |
| 5323076 | Disk spindle motor | — | 1994-06-21 |
| 4734606 | Electric motor with ferrofluid bearing | — | 1988-03-29 |
| 4421967 | Windmill driven eddy current heater | Warren J. Birgel | 1983-12-20 |