Ronald C. Markham
20Patents
13h-index
12Co-inventors
78Inventor score
Filing activity: Jan 11, 1993 → Jan 20, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6825620B2 | Inductively coupled ballast circuit | Emerging Cross-Sectional Technologies | 435 | Expired |
| US6436299B1 | Water treatment system with an inductively coupled ballast | Electricity | 430 | Expired |
| US6673250B2 | Radio frequency identification system for a fluid treatment system | Electricity | 360 | Expired |
| US7385357B2 | Inductively coupled ballast circuit | Emerging Cross-Sectional Technologies | 349 | Active |
| US7180248B2 | Inductively coupled ballast circuit | Emerging Cross-Sectional Technologies | 270 | Expired |
| US5536395A | Home water purification system with automatic disconnecting of radiant energy source | Chemistry; Metallurgy | 94 | Expired |
| US5853572A | Home water purification system | Chemistry; Metallurgy | 82 | Expired |
| US8222827B2 | Inductively coupled ballast circuit | Emerging Cross-Sectional Technologies | 52 | Active |
| US5698091A | Home water purification system with filter end of life monitor | Chemistry; Metallurgy | 51 | Expired |
| US8618749B2 | Inductively coupled ballast circuit | Emerging Cross-Sectional Technologies | 50 | Active |
| US5611918A | Electronic driver for water treatment system UV bulb | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5324423A | UV bulb intensity control for water treatment system | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5401394A | Water treatment system ultraviolet bulb voltage monitor circuit | Chemistry; Metallurgy | 16 | Expired |
| US5738780A | Voltage converter for water treatment system UV bulb | Emerging Cross-Sectional Technologies | 11 | Expired |
| US9299493B2 | Inductively coupled ballast circuit | Emerging Cross-Sectional Technologies | 10 | Active |
| US9590456B2 | Inductively coupled ballast circuit | Emerging Cross-Sectional Technologies | 7 | Active |
| US8940085B2 | Humidifier with ultraviolet disinfection | Emerging Cross-Sectional Technologies | 4 | Active |
| US9482440B2 | Humidifier with ultraviolet disinfection | Emerging Cross-Sectional Technologies | 3 | Active |
| US9397524B2 | Inductively coupled ballast circuit | Emerging Cross-Sectional Technologies | 3 | Active |
| US10014722B2 | Inductively coupled ballast circuit | Emerging Cross-Sectional Technologies | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.