Freddy Derfler
2Patents
2h-index
3Co-inventors
37Inventor score
Filing activity: Dec 5, 1984 → Aug 3, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6409916B1 | Filter element for pool-cleaning device | Fixed Constructions | 45 | Expired |
| US4635917A | Method and apparatus for feeding sheets, particularly fabrics from a stack | Performing Operations; Transporting | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.