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1997-03-05
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1998-10-29
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Power Measuring Methods
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Method and apparatus for testing self-commutative electric power conversion device
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Battery charging device and method
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1992-03-04
Power testing apparatus
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Process for metering electric power and device for its implementation
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Method and device for evaluating electric power expenditure using differential tariff
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1992-09-02
Output method and apparatus
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1996-09-25
Voltage measuring apparatus
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Charging and measuring apparatus
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Thin-film formation device and method