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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21/00
Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
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H02K21/12
with stationary armatures and rotating magnets
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H02K21/22
with magnets rotating around the armatures, e.g. flywheel magnetos
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H02K21/227
having an annular armature coil
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