4. Electrical generator or motor structure
  5. Dynamoelectric
  6. Rotary

George J. Hoffman

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Bore hole navigator

Geometrical instruments – Indicator of direction of force traversing natural media – Borehole direction or inclination
Patent

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Ferro-fluid bearing

Electrical generator or motor structure – Dynamoelectric – Rotary
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Magnet structure

Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
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Profile ID: LFUS-PAI-P-232149

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