Willi Frank
6Patents
4h-index
16Co-inventors
54Inventor score
Filing activity: Feb 6, 1975 → Feb 12, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4291713A | Device for heating the seams of wrappers for rod-like fillers in cigarette making machines or the like | Human Necessities | 72 | Expired |
| US5310373A | Method for producing electrodes for spark plugs and spark plug electrodes | Electricity | 13 | Expired |
| US6364220B2 | Fuel injection valve | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5267694A | Fuel injection nozzle for internal combustion engines | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US4059940A | Apparatus for filling containers with cigarettes or the like | Human Necessities | 2 | Expired |
| US3974750A | Method and apparatus for neutralizing electrostatic charges of filter material for smokers' products | Human Necessities | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.