Frank Schaeffel
2Patents
1h-index
5Co-inventors
41Inventor score
Filing activity: Aug 15, 1986 → Aug 10, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4834528A | Infrared photoretinoscope | Human Necessities | 32 | Expired |
| US10531794B1 | Photorefractive flash device and system | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.