4. Fire escape, ladder, or scaffold
  5. Wall- or floor-attached

Robert K. Gregory

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Adjustable depth truss

Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Components adjustably or collapsibly connected
Patent

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Adjustable shoring system

Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Components adjustably or collapsibly connected
Patent

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Foldable scaffold and method

Fire escape – ladder – or scaffold – Wall- or floor-attached
Patent

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Profile ID: LFUS-PAI-P-898809

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