4. Fire escape, ladder, or scaffold
  5. Unitary foldable, rigid scaffold or ladder
  6. Trestle

Edgar D. Jackson

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Joist having differing metal web reinforcement

Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Side-by-side terminus shafts; e.g. – truss
Patent

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Saw horse

Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Trestle
Patent

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Wood rivet and method of installation in a truss

Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Side-by-side terminus shafts; e.g. – truss
Patent

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Profile ID: LFUS-PAI-P-775288

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