Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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17/00
Fixed inductances of the signal type
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H01F17/06
with core substantially closed in itself, e.g. toroid
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H01F2017/067
Core with two or more holes to lead through conductor
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