Issued Patents All Time
Showing 26–50 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7084548 | Low cost high speed electrical machine | — | 2006-08-01 |
| 7066050 | Life counter for flywheel energy storage systems | David Campbell | 2006-06-27 |
| 7068014 | Online alternator flywheel system | — | 2006-06-27 |
| 7053589 | Long-life vacuum system for energy storage flywheels | David Campbell | 2006-05-30 |
| 7042109 | Wind turbine | — | 2006-05-09 |
| 6891302 | Light-weight high-power electrical machine | — | 2005-05-10 |
| 6828710 | Airgap armature | — | 2004-12-07 |
| 6825588 | Uninterruptible power supply using a high speed cylinder flywheel | David Campbell | 2004-11-30 |
| 6819012 | Flywheel energy storage system | — | 2004-11-16 |
| 6806605 | Permanent magnetic bearing | — | 2004-10-19 |
| 6798092 | Low outgas flywheel motor/generator | David Campbell | 2004-09-28 |
| 6794776 | Inductor alternator flywheel system | — | 2004-09-21 |
| 6788029 | Flywheel with switched coupling regulator | — | 2004-09-07 |
| 6767589 | Method for metal coating a flywheel rim | — | 2004-07-27 |
| 6750588 | High performance axial gap alternator motor | — | 2004-06-15 |
| 6727616 | Flywheel energy storage system with quill stabilizer | David Campbell | 2004-04-27 |
| 6720674 | Device for prevention of power interruptions | — | 2004-04-13 |
| 6710489 | Axially free flywheel system | — | 2004-03-23 |
| 6707187 | Flywheel system with tilt switch | — | 2004-03-16 |
| 6703735 | Active magnetic thrust bearing | — | 2004-03-09 |
| 6664680 | Flywheel device with active magnetic bearings | — | 2003-12-16 |
| 6639370 | Speed control for a flywheel energy storage system | — | 2003-10-28 |
| 6630761 | Combination mechanical and magnetic support for a flywheel power supply | — | 2003-10-07 |
| 6624542 | Flywheel power source with passive generator cooling | David Campbell | 2003-09-23 |
| 6609674 | High-speed manufacturing method for composite flywheels | — | 2003-08-26 |