Robert Pirker
6Patents
4h-index
5Co-inventors
50Inventor score
Filing activity: Jun 5, 1975 → Jan 27, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4514235A | Frog, in particular frog point, for rail crossing or rail switches as well as process for producing same | Emerging Cross-Sectional Technologies | 12 | Expired |
| US3977635A | Railway switch for Vignoles rails | Performing Operations; Transporting | 7 | Expired |
| US4168817A | Rail switch | Fixed Constructions | 7 | Expired |
| US4159090A | Railway switch for vignoles rails | Fixed Constructions | 6 | Expired |
| US9776884B2 | Process for obtaining precipitated calcium carbonate | Chemistry; Metallurgy | 0 | Active |
| US10343929B2 | Process for obtaining precipitated calcium carbonate | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.