Hugo Frei
3Patents
3h-index
6Co-inventors
36Inventor score
Filing activity: May 11, 1993 → Jun 12, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5384018A | Process and apparatus for generating and igniting a low-voltage | Electricity | 18 | Expired |
| US5651528A | Vacuum valve | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5833212A | Vacuum valve | Mechanical Engineering; Lighting; Heating | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.