EP0651922A1
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Induction motor speed control having improved sensing of motor operative conditions
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US5367600A
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Motor control for a treadmill having improved power supply and improved speed regulation under intermittent loading
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US5351336A
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Motor control having improved speed regulation under intermittent loading
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US5283726A
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AC line current controller utilizing line connected inductance and DC voltage component
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US4914383A
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Non-contact ammeter
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US4475070A
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Motor torque control with improved linearity
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US4366388A
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Energy utilization circuit and method
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US4200833A
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Power maximization circuit
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US4074194A
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Watt meter providing electrical signal proportional to power
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US4059772A
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Waste energy source utilization circuit and method
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US3946242A
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Geophysical energy source utilization circuit
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