Karl Frei
6Patents
4h-index
8Co-inventors
50Inventor score
Filing activity: Mar 28, 1984 → Aug 28, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4537511A | Apparatus for generating and radiating ultrasonic energy | Physics | 43 | Expired |
| US5653346A | Process and device for sifting, sorting, screening, filtering or sizing substances | Performing Operations; Transporting | 27 | Expired |
| US6694705B1 | Defoaming device for a packaging machine | Performing Operations; Transporting | 5 | Expired |
| US6039867A | Device for continuous disintegration of activated sludge | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5895577A | Method for continuous disintegration of activated sludge | Emerging Cross-Sectional Technologies | 3 | Expired |
| US11823815B2 | Shield for a terminal of a high-voltage electrical device and method for operating the same | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.