Mark E. Duffy
23Patents
10h-index
37Co-inventors
75Inventor score
Filing activity: Oct 31, 1988 → Jun 18, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5675677A | Lamp-to-light guide coupling arrangement for an electrodeless high intensity discharge lamp | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5587626A | Patterned optical interference coatings for only a portion of a high intensity lamp envelope | Electricity | 29 | Expired |
| US5479072A | Low mercury arc discharge lamp containing neodymium | Electricity | 26 | Expired |
| US5306987A | Acoustic resonance arc stabilization arrangement in a discharge lamp | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5866982A | Arctube for high pressure discharge lamp | Electricity | 20 | Expired |
| US5140227A | Starting aid for an electrodeless high intensity discharge lamp | Electricity | 16 | Expired |
| US5676579A | Patterned optical interference coatings for electric lamps | Electricity | 13 | Expired |
| US5095249A | Gas probe starter for an electrodeless high intensity discharge lamp | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5378965A | Luminaire including an electrodeless discharge lamp as a light source | Electricity | 11 | Expired |
| US5214357A | Low-loss L-C drive circuit for an electrodeless high intensity discharge lamp | Electricity | 11 | Expired |
| US5363015A | Low mercury arc discharge lamp containing praseodymium | Electricity | 10 | Expired |
| US5151633A | Self-extinguishing gas probe starter for an electrodeless high intensity discharge lamp | Electricity | 8 | Expired |
| US6741013B2 | Shrouded electric lamp having functionally distinguishable center supports | Electricity | 7 | Expired |
| US5879215A | Crimp length gauge for ceramic metal halide electrodes | Electricity | 7 | Expired |
| US5479102A | Simulated load circuit for simulating the arc impedance of an electrodless discharge lamp | Physics | 5 | Expired |
| US5150015A | Electrodeless high intensity discharge lamp having an intergral quartz outer jacket | Electricity | 5 | Expired |
| US5248918A | Starting aid for an electrodeless high intensity discharge lamp | Electricity | 5 | Expired |
| US5332970A | Method for measuring the impedance of an electrodeless arc discharge lamp | Physics | 4 | Expired |
| US4891554A | Arc discharge lamp having improved performance | Electricity | 4 | Expired |
| US5373216A | Electrodeless arc tube with stabilized condensate location | Electricity | 4 | Expired |
| US5440199A | Base for electrodeless discharge lamp | Electricity | 4 | Expired |
| US8405324B2 | Hospital lighting with solid state emitters | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US8633653B2 | Lighting control system with improved efficiency | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.