Barry Drager
10Patents
6h-index
13Co-inventors
63Inventor score
Filing activity: Jan 3, 1990 → Aug 29, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5867004A | Relative angel estimation apparatus for a sensorless switched reluctance machine system | Electricity | 28 | Expired |
| US5689165A | Estimator initialization circuit and method for a sensorless switched reluctance machine system | Electricity | 26 | Expired |
| US6211633A | Synchronous sampling circuit for a sensorless switching reluctance machine system | Electricity | 24 | Expired |
| US5844385A | Absolute angle estimation apparatus for a sensorless switched reluctance machine system | Electricity | 23 | Expired |
| US5920175A | Instantaneous position indicating apparatus for a sensorless switched reluctance machine system | Electricity | 12 | Expired |
| US6260833A | Fail safe coil spring including mounting mechanism | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US7770526B2 | Railcar man-way cover lift-assist system | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US5529290A | Apparatus for quenching coil springs to assure cooling | Chemistry; Metallurgy | 3 | Expired |
| US4991185A | Method of testing n-bit programmable counters | Physics | 2 | Expired |
| US11133665B2 | Direct current over voltage monitoring and protection | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.