Werner Wallrafen
51Patents
14h-index
20Co-inventors
84Inventor score
Filing activity: Nov 28, 1984 → Jan 31, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5412255A | Switch device suitable for use in automotive vehicles | Electricity | 86 | Expired |
| US5140234A | Windshield wiper control based on rate of change of sensor signal | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5798640A | Passive magnetic position sensor | Physics | 24 | Expired |
| US5157312A | Device including wetness sensor for controlling a windshield wiper | Emerging Cross-Sectional Technologies | 24 | Expired |
| US6401533B1 | Level indicator | Physics | 22 | Expired |
| US5719332A | Process and system for operating a level sensor | Physics | 20 | Expired |
| US5442865A | Passive magnetic position sensor | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4829247A | Angle sensor with inductive coil coupling | Electricity | 18 | Expired |
| US5140233A | Control of windshield wiper by integration and differentiation of sensor signal | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4646011A | Electronic angular position transmitter with toroidal core and rotatable magnet | Emerging Cross-Sectional Technologies | 17 | Expired |
| US6002328A | Tank display system and method for determining the remaining volume in a tank | Performing Operations; Transporting | 16 | Expired |
| US6445176B1 | Self-adaptive sensor unit for determining pulse switching points | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5172065A | Evaluation circuit for a capacitive sensor | Performing Operations; Transporting | 15 | Expired |
| US6293145A | Sensor for accurate measurement of levels in irregularly shaped tanks | Physics | 14 | Expired |
| US6070337A | Passive magnetic position sensor | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6417662B1 | Tachogenerator for detecting the rotational speed of a rotating machine part | Physics | 12 | Expired |
| US6356087B1 | System for determining relative air humidity | Physics | 12 | Expired |
| US6016705A | Pressure sensor with pivoting lever | Physics | 10 | Expired |
| US6181127A | Method and circuit for checking the width of the air gap in a speed sensor | Physics | 9 | Expired |
| US4868497A | Determining angular velocity from two quadrature signals by squaring the derivative of each signal and taking the square root of the sum | Physics | 9 | Expired |
| US6072387A | Device for triggering a control and/or warning process in a motor vehicle | Performing Operations; Transporting | 8 | Expired |
| US6202811A | Clutch | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5092171A | Acceleration sensor with differential capacitance | Physics | 7 | Expired |
| US6527517B1 | Pump | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US9080896B2 | Method for analyzing signals from an angle sensor | Physics | 6 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.