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Patent classifications
H
ELECTRICITY
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H02
GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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H02K
DYNAMO-ELECTRIC MACHINES
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23/00
DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
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H02K23/02
characterised by arrangement for exciting
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H02K23/04
having permanent magnet excitation
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