4. Fire escape, ladder, or scaffold
  5. Means maintaining platform level on angularly movable support
  6. Swingable support

Wayne P. MacDonald

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Boom latching system

Static structures (e.g. – buildings) – Controlled by condition responsive means
Patent

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Collapsible tower boom lift

Fire escape – ladder – or scaffold – Means maintaining platform level on angularly movable support – Swingable support
Patent

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Leveling assembly for work platforms on articulating booms

Fire escape – ladder – or scaffold – Means maintaining platform level on angularly movable support – Swingable support
Patent

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Profile ID: LFUS-PAI-P-1871099

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