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Active scaffolding systems

Fire escape – ladder – or scaffold – Platform with elevating or lowering means
Patent

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Adjustable scaffold

Fire escape – ladder – or scaffold – Platform with elevating or lowering means
Patent

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Adjustable scaffolding and lift carriage and support member...

Fire escape – ladder – or scaffold – Platform with elevating or lowering means
Reexamination Certificate

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Adjustable scaffolding and lift carriage and support member...

Fire escape – ladder – or scaffold – Platform with elevating or lowering means
Reexamination Certificate

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Aerial basket structure for linemen and method for utilizing sam

Fire escape – ladder – or scaffold – Platform with elevating or lowering means – Suspended
Patent

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Apparatus for aligning a mobile lift work platform

Fire escape – ladder – or scaffold – Platform with elevating or lowering means – Suspended
Patent

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Apparatus for controlled stabilized descent

Fire escape – ladder – or scaffold – Platform with elevating or lowering means – Suspended
Reexamination Certificate

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Apparatus for escaping from building on fire

Fire escape – ladder – or scaffold – Platform with elevating or lowering means – Suspended
Patent

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Apparatus for moving a work platform along a rail

Fire escape – ladder – or scaffold – Platform with elevating or lowering means
Patent

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Apparatus for self-adjusting the height of an outrigger attachab

Fire escape – ladder – or scaffold – Platform with elevating or lowering means – Operating means on platform
Patent

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Apparatus for suspending a person above ground

Fire escape – ladder – or scaffold – Platform with elevating or lowering means – Suspended
Patent

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Arrangement in hanging cradles

Fire escape – ladder – or scaffold – Platform with elevating or lowering means – Suspended
Patent

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