4. Geometrical instruments
  5. Straightedge type
  6. Base attached

Frank R. Wurtz

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Perspective drawing machine

Geometrical instruments – Straightedge type – Base attached
Patent

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Perspective drawing machine

Geometrical instruments – Straightedge type – Base attached
Patent

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Wind generator

Prime-mover dynamo plants – Electric control – Fluid-current motors
Patent

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Wind generator system

Fluid reaction surfaces (i.e. – impellers) – With means positioning fluid current driven impeller... – Feathering cycle related to flow direction
Patent

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Profile ID: LFUS-PAI-P-353988

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