David A. Fox
45Patents
13h-index
22Co-inventors
81Inventor score
Filing activity: Dec 16, 1975 → Sep 18, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4459576A | Toroidal transformer with electrostatic shield | Electricity | 42 | Expired |
| US4404473A | Direct current power controller | Electricity | 28 | Expired |
| US4933623A | Generator voltage regulator power circuit | Electricity | 24 | Expired |
| US6254952A | Strip tied label sheet | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4754161A | Circuit and method for paralleling AC electrical power systems | Electricity | 20 | Expired |
| US4943761A | Current limited DC power controller | Electricity | 20 | Expired |
| US4446417A | Voltage regulator for aircraft generators | Electricity | 19 | Expired |
| US4766327A | Circuit and method for synchronizing power sources in a parallel AC electrical power system | Electricity | 17 | Expired |
| US4086503A | Control circuit initiating conduction of an opto-isolator unit | Electricity | 17 | Expired |
| US4901072A | Position detector utilizing gray code format | Electricity | 17 | Expired |
| US4617622A | Switching time correction circuit for electronic inverters | Electricity | 16 | Expired |
| US5181155A | Overcurrent trip circuit | Electricity | 15 | Expired |
| US4807106A | Method and circuit for voltage regulation of DC power sources | Electricity | 13 | Expired |
| US4864214A | Solid state power controller | Electricity | 13 | Expired |
| US4188547A | Multi-mode control logic circuit for solid state relays | Electricity | 11 | Expired |
| US5017857A | Circuit and method for voltage regulation of electric power sources | Electricity | 10 | Expired |
| US4408131A | Optically isolated solid state relay | Electricity | 10 | Expired |
| US4835652A | Bi-directional DC power controller with fault protection | Electricity | 9 | Expired |
| US4797570A | Automatic paralleling of AC power sources | Electricity | 9 | Expired |
| US4816756A | Circuit and method for statically testing rotating rectifiers in brushless alternators | Physics | 8 | Expired |
| US4029972A | Ramping circuit | Electricity | 7 | Expired |
| US5073724A | Programmable inverse time delay circuit | Electricity | 6 | Expired |
| US9019099B2 | Systems and methods for patient monitoring | Emerging Cross-Sectional Technologies | 6 | Active |
| US4408137A | Break-before-make solid state relay | Electricity | 5 | Expired |
| US4970458A | AC voltage sensing for voltage regulators | Physics | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.