David L. Wortman
26Patents
21h-index
19Co-inventors
78Inventor score
Filing activity: Oct 30, 1989 → Jan 31, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5771328A | Light directing film having variable height structured surface and light directing article constructed therefrom | Emerging Cross-Sectional Technologies | 297 | Expired |
| US5828488A | Reflective polarizer display | Physics | 280 | Expired |
| US5825542A | Diffusely reflecting multilayer polarizers and mirrors | Physics | 205 | Expired |
| US6262842A | Transflective displays with reflective polarizing transflector | Physics | 177 | Expired |
| US6025897A | Display with reflective polarizer and randomizing cavity | Physics | 134 | Expired |
| US6124971A | Transflective displays with reflective polarizing transflector | Physics | 122 | Expired |
| US6080467A | High efficiency optical devices | Emerging Cross-Sectional Technologies | 122 | Expired |
| US6101032A | Light fixture having a multilayer polymeric film | Emerging Cross-Sectional Technologies | 111 | Expired |
| US6091547A | Luminance control film | Physics | 106 | Expired |
| US6905220B2 | Backlight system with multilayer optical film reflector | Physics | 67 | Expired |
| US6515785B1 | Optical devices using reflecting polarizing materials | Emerging Cross-Sectional Technologies | 45 | Expired |
| US7038745B2 | Brightness enhancing reflective polarizer | Physics | 43 | Expired |
| US6018419A | Diffuse reflectors | Physics | 40 | Expired |
| US6210785A | High efficiency optical devices | Emerging Cross-Sectional Technologies | 40 | Expired |
| US6924014B2 | High efficiency optical devices | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5202683A | Optical traffic preemption detector | Physics | 33 | Expired |
| US5363470A | Displacing an optical lighting film's linear array of grooves to facilitate emission of light | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6543153B1 | Reflective polarizer having improved properties and optical display with improved reflective polarizer | Physics | 31 | Expired |
| US5095415A | Light fixture for externally illuminated sign | Emerging Cross-Sectional Technologies | 29 | Expired |
| US6447135B1 | Lightguide having a directly secured reflector and method of making the same | Physics | 28 | Expired |
| US6934082B2 | Optical devices using reflecting polarizing materials | Emerging Cross-Sectional Technologies | 23 | Expired |
| US7147903B2 | High efficiency optical devices | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6641883B2 | High efficiency optical devices | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6888675B2 | Transflective displays with reflective polarizing transflector | Physics | 7 | Expired |
| US7423708B2 | Display having a reflective polarizer | Physics | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.