4. Traversing hoists
  5. Having vertically swinging boom
  6. Having means to swing boom vertically

Kenneth V. Johnson

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Boom point construction

Traversing hoists – Having vertically swinging boom – Having means to swing boom vertically
Patent

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Crane mounting

Traversing hoists – Having horizontally swinging boom or bridge
Patent

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Hydrostatic winch

Power plants – Pressure fluid source and motor – Control relative to independently driven oscillator – speed...
Patent

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Profile ID: LFUS-PAI-P-260317

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