John Schaefer
5Patents
4h-index
5Co-inventors
50Inventor score
Filing activity: Sep 10, 1996 → Jun 8, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5838239A | System for detecting ice or snow on surface which specularly reflects light | Performing Operations; Transporting | 146 | Expired |
| US6069565A | System for detecting ice or snow on surface which specularly reflects light | Performing Operations; Transporting | 88 | Expired |
| US6462555B1 | Apparatus for detecting a completed electrical circuit, reverse polarity, ground and ground fault interrupter | Electricity | 17 | Expired |
| US6246225A | Apparatus for detecting a completed electrical circuit and testing an electrical output receptacle | Physics | 7 | Expired |
| US11578967B2 | Wafer inspection system including a laser triangulation sensor | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.