4. Fire escape, ladder, or scaffold
  5. Wall- or floor-attached
  6. Wall-mounted platform, with ladder

Roger P. Day

Inventor

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Boat platform ladder

Fire escape – ladder – or scaffold – Wall- or floor-attached – Wall-mounted platform – with ladder
Patent

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Direct current welding system

Electric heating – Metal heating – By arc
Patent

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Stair device

Ships – Boats – boat component – or attachment – Boarding aids
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1299545

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