Hans-Peter Ehrl
4Patents
3h-index
9Co-inventors
47Inventor score
Filing activity: Jun 16, 1977 → Oct 31, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9310231B2 | Checking unit and method for calibrating a checking unit | Physics | 29 | Active |
| US7737417B2 | Device and method for verifying value documents | Physics | 23 | Expired |
| US4207835A | Arrangement and photometer for measuring and controlling the thickness of optically active thin layers | Physics | 7 | Expired |
| US9460579B2 | Sensor for checking value documents | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.