David M. Erdman
41Patents
27h-index
30Co-inventors
85Inventor score
Filing activity: Jun 24, 1974 → Jun 16, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4459519A | Electronically commutated motor systems and control therefor | Mechanical Engineering; Lighting; Heating | 790 | Expired |
| US4015182A | Refrigeration system and control therefor | Emerging Cross-Sectional Technologies | 121 | Expired |
| US5376866A | Motor controls, refrigeration systems and methods of motor operation and control | Emerging Cross-Sectional Technologies | 96 | Expired |
| US5023527A | Control circuits, electronically commutated motor systems and methods | Mechanical Engineering; Lighting; Heating | 87 | Expired |
| US4763347A | Control system, electronically commutated motor system, blower apparatus and methods | Mechanical Engineering; Lighting; Heating | 78 | Expired |
| US4390826A | Laundering apparatus, method of operating a laundry machine, control system for an electronically commutated motor, method of operating an electronically commutated motor, and circuit | Emerging Cross-Sectional Technologies | 72 | Expired |
| US4654566A | Control system, method of operating an electronically commutated motor, and laundering apparatus | Mechanical Engineering; Lighting; Heating | 71 | Expired |
| US5125067A | Motor controls, refrigeration systems and methods of motor operation and control | Electricity | 70 | Expired |
| US5796194A | Quadrature axis winding for sensorless rotor angular position control of single phase permanent magnet motor | Electricity | 67 | Expired |
| US5986419A | Quadrature axis winding for sensorless rotor angular position control of single phase permanent magnet motor | Electricity | 66 | Expired |
| US4005347A | Electronically commutated motor and method of making same | Electricity | 63 | Expired |
| US4556827A | Laundering apparatus, method of operating a laundry machine, control system for an electronically commutated motor, method of operating an electronically commutated motor, and circuit | Mechanical Engineering; Lighting; Heating | 59 | Expired |
| US5028073A | Dynamic vehicle suspension system including electronically commutated motor | Emerging Cross-Sectional Technologies | 58 | Expired |
| US5657638A | Two speed control circuit for a refrigerator fan | Mechanical Engineering; Lighting; Heating | 57 | Expired |
| US4638233A | Method of establishing a preferred rate of air flow, method of determining torque, and apparatus | Electricity | 54 | Expired |
| US5075608A | Control system, electronically commutated motor system, draft inducer apparatus and method | Mechanical Engineering; Lighting; Heating | 54 | Expired |
| US6271638A | Brushless D. C. motor and control assembly | Emerging Cross-Sectional Technologies | 53 | Expired |
| US4998052A | Gearless direct drive switched reluctance motor for laundry application | Electricity | 47 | Expired |
| US6348752B1 | Integral motor and control | Emerging Cross-Sectional Technologies | 43 | Expired |
| US6414408B1 | Integral motor and control | Emerging Cross-Sectional Technologies | 43 | Expired |
| US4449079A | Control system for an electronically commutated motor | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US6239532A | Motor with external rotor | Electricity | 32 | Expired |
| US6479957B1 | Integral motor and control | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5847524A | Constant speed control for a motor | Electricity | 30 | Expired |
| US5986379A | Motor with external rotor | Electricity | 28 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.