Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE41170 | Voltage regulation of a utility power network | Thomas Hubert, Douglas C. Folts | 2010-03-30 |
| 6987331 | Voltage recovery device for use with a utility power network | Paul F. Koeppe, Arnold P. Kehrli, Donald L. Brown, John A. Diaz De Leon, II, Douglas C. Folts | 2006-01-17 |
| 6906434 | Electric utility system with superconducting magnetic energy storage | Paul F. Koeppe, Arnold P. Kehrli, John A. Diaz De Leon, II, Donald L. Brown, Douglas C. Folts | 2005-06-14 |
| 6577108 | Voltage regulation of a utility power network | Thomas Hubert, Douglas C. Folts | 2003-06-10 |
| 6445555 | Method and apparatus for discharging a superconducting magnet | Douglas C. Folts | 2002-09-03 |
| 6414853 | Method and apparatus for controlling a phase angle of AC power to keep DC voltage from an energy source constant | Douglas C. Folts | 2002-07-02 |
| 5644218 | Protection device for a superconducting coil of a superconducting voltage stabilizer | Jeffery C. Emmerich, Eric L. Kostecki | 1997-07-01 |
| 5532664 | Modular superconducting energy storage device | Richard A. Lundy | 1996-07-02 |