Douglas C. Folts
26Patents
10h-index
31Co-inventors
75Inventor score
Filing activity: May 17, 1991 → Dec 4, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5315533A | Back-up uninterruptible power system | Electricity | 182 | Expired |
| US5302858A | Method and apparatus for providing battery charging in a backup power system | Electricity | 78 | Expired |
| US6987331B2 | Voltage recovery device for use with a utility power network | Emerging Cross-Sectional Technologies | 60 | Expired |
| US7091703B2 | Dynamic reactive compensation system and method | Emerging Cross-Sectional Technologies | 51 | Expired |
| US6266260A | Inverter having center switch and uninterruptible power supply implementing same | Electricity | 34 | Expired |
| US6577108B2 | Voltage regulation of a utility power network | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6906434B1 | Electric utility system with superconducting magnetic energy storage | Emerging Cross-Sectional Technologies | 26 | Expired |
| US8120932B2 | Low voltage ride through | Emerging Cross-Sectional Technologies | 15 | Active |
| US7567160B2 | Supplementary transformer cooling in a reactive power compensation system | Electricity | 13 | Active |
| US6900619B2 | Reactive power compensation to minimize step voltage changes and transients | Emerging Cross-Sectional Technologies | 12 | Expired |
| US7989983B2 | Power conversion systems | Emerging Cross-Sectional Technologies | 10 | Active |
| USRE41170E1 | Voltage regulation of a utility power network | General | 8 | Active |
| US7265521B2 | Reactive power compensation to minimize step voltage changes and transients | Emerging Cross-Sectional Technologies | 7 | Expired |
| US8189324B2 | Power electronic assembly with slotted heatsink | Electricity | 6 | Active |
| US7674751B2 | Fabrication of sealed high temperature superconductor wires | Emerging Cross-Sectional Technologies | 6 | Active |
| US6414853B2 | Method and apparatus for controlling a phase angle of AC power to keep DC voltage from an energy source constant | Electricity | 5 | Expired |
| US6445555B1 | Method and apparatus for discharging a superconducting magnet | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7724482B2 | Parallel HTS transformer device | Emerging Cross-Sectional Technologies | 5 | Active |
| US7902461B2 | Fault current limiting HTS cable and method of configuring same | Emerging Cross-Sectional Technologies | 3 | Active |
| US8886267B2 | Fault current limiting HTS cable and method of configuring same | Emerging Cross-Sectional Technologies | 3 | Active |
| US6600973B1 | Method and apparatus for providing power to a utility network | Emerging Cross-Sectional Technologies | 2 | Expired |
| US10669001B2 | Hybrid electrical and mechanical propulsion and energy system for a ship | Emerging Cross-Sectional Technologies | 1 | Active |
| US10193340B2 | Multi-level cascaded H-bridge STATCOM circulating cooling fluid within enclosure | Emerging Cross-Sectional Technologies | 1 | Active |
| US8532725B2 | Parallel connected HTS utility device and method of using same | Emerging Cross-Sectional Technologies | 1 | Active |
| US9172312B2 | Reducing photovoltaic array voltage during inverter re-enablement | Emerging Cross-Sectional Technologies | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.