John Echols
10Patents
5h-index
10Co-inventors
63Inventor score
Filing activity: Feb 4, 1983 → Mar 31, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5674018A | Weatherproof electronic keypad with replaceable graphics overlay | Electricity | 21 | Expired |
| US4458173A | Pressure sensitive electric signal generator | Electricity | 10 | Expired |
| US4490639A | Coupling circuit between high impedance piezoelectric signal source and utilizing circuit | Emerging Cross-Sectional Technologies | 9 | Expired |
| USD724588S1 | Smart card RFID reader | General | 7 | Active |
| USD459671S1 | Keypad | General | 6 | Expired |
| US4636775A | Sensor for an alarm system | Physics | 5 | Expired |
| USD738882S1 | Touchless microwave switch | General | 2 | Active |
| USD491087S1 | Keypad | General | 1 | Expired |
| US9140757B2 | Testing a circuit assembly that contains a piezoelectric switch | Electricity | 0 | Active |
| US7063471B2 | Access control apparatus | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.