Helmut Letzel
4Patents
2h-index
5Co-inventors
41Inventor score
Filing activity: Nov 22, 1996 → Feb 13, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6539760B1 | Monitoring device | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6283514A | Apparatus for monitoring and controlling access to a restricted area | Emerging Cross-Sectional Technologies | 10 | Expired |
| US11045975B2 | Extrusion components for honeycomb bodies | Performing Operations; Transporting | 1 | Active |
| US5896783A | Safety switch device | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.