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1974-02-28
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1948-01-13
Voltage stabilizing transformer
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1932-06-21
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1970-10-06
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1983-03-29
Adjustable current source
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1974-11-12
Combined power and instrument potential transformer
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1962-01-03
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1969-02-25
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1970-09-09
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1972-10-10
Circuit for measuring the power consumption of three phase loads
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1959-11-18
Improvements in or relating to echo waveform correctors
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1954-06-15
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1952-02-12
Apparatus for the measurement of high-frequency power
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1935-02-05
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1949-02-08
Transformer network
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1933-04-18
Electrical measuring instrument
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1980-04-25
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