James E. Hansen
65Patents
21h-index
86Co-inventors
91Inventor score
Filing activity: Dec 9, 1974 → Feb 3, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5185686A | Direction sensing arc detection | Electricity | 105 | Expired |
| US5208542A | Timing window arc detection | Electricity | 87 | Expired |
| US5430613A | Current transformer using a laminated toroidal core structure and a lead frame | Emerging Cross-Sectional Technologies | 62 | Expired |
| US4591006A | Well servicing rig | Fixed Constructions | 51 | Expired |
| US4412137A | Dual voltage engine starter management system | Mechanical Engineering; Lighting; Heating | 50 | Expired |
| US4316230A | Minimum size, integral, A.C. overload current sensing, remote power controller with reset lockout | Electricity | 48 | Expired |
| US4873453A | DC motor speed controller having protection | Emerging Cross-Sectional Technologies | 41 | Expired |
| US4490620A | Engine starter protective and control module and system | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US6278281A | Fluid condition monitor | Physics | 38 | Expired |
| US5174389A | Carousel well rig | Fixed Constructions | 32 | Expired |
| US6433560B1 | Combined fluid condition monitor and fluid level sensor | Physics | 29 | Expired |
| US4851743A | DC motor speed controller having protection | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4412267A | Time-delay current sensing circuit breaker relay | Electricity | 26 | Expired |
| US6356423B1 | Soild state protection circuit for electrical apparatus | Electricity | 26 | Expired |
| US6271656A | Electrical current sensing apparatus | Physics | 25 | Expired |
| US7259546B1 | Temperature compensating integrated anti-differential current sensing system | Physics | 25 | Expired |
| US4227231A | Integral relay low voltage retentive means | Electricity | 23 | Expired |
| US3970908A | A.C. motor starting system | Electricity | 23 | Expired |
| US6012736A | Vehicle steering column control system | Performing Operations; Transporting | 22 | Expired |
| US4121927A | Method of producing high carbon hard alloys | Chemistry; Metallurgy | 21 | Expired |
| US4477613A | Stabilization of tackifying resin dispersions | Chemistry; Metallurgy | 21 | Expired |
| US6130599A | Electrical current sensing apparatus | Electricity | 20 | Expired |
| US5425166A | Current transformer using a laminated toroidal core structure and a lead frame | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4209816A | Protective control for vehicle starter and electrical systems | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4841235A | MRS current sensor | Physics | 19 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.