Wilhelm Ruf KG
17Patents
0Active
17Granted
31Portfolio score
Filing activity: Jul 30, 1974 → Aug 19, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4847614A | Electronic remote control means, especially for centrally controlled locking systems in motor vehicles | Physics | 79 | Expired |
| US4287394A | Keyboard switch assembly with printed circuit board | Electricity | 18 | Expired |
| US4440823A | Printed board for electrical circuits | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4771143A | Diaphragm keyboard | Electricity | 8 | Expired |
| US4520228A | Multi-layer conductor plate and a method of making | Electricity | 7 | Expired |
| US4894638A | Potentiometer having vibration damping means | Electricity | 7 | Expired |
| US4035747A | Adjustable attenuation equalizer | Electricity | 6 | Expired |
| US4908598A | Rotary potentiometer | Electricity | 4 | Expired |
| US3938070A | Trimming potentiometer in T or Pi network connection with parallel resistance paths | Electricity | 4 | Expired |
| US4717903A | Trimming resistor | Electricity | 3 | Expired |
| US5781099A | Trimmer resistor | Electricity | 3 | Expired |
| US4845461A | Potentiometer | Electricity | 2 | Expired |
| US4719461A | Method of selective control of electrical circuits and a circuit arrangement for carrying out the method | Electricity | 2 | Expired |
| US4097828A | Tuning unit with bandswitch for high frequency receivers | Electricity | 1 | Expired |
| US4998089A | Potentiometer and method of making the same | Electricity | 1 | Expired |
| US4866413A | Potentiometer and method of making the same | Electricity | 0 | Expired |
| US5354019A | Holding means for mounting an electrical component actuated by a rotating spindle on an object | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.