4. Fire escape, ladder, or scaffold
  5. Convertible
  6. Ladder

Danny O. Derrick

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Attachment device for flexible films and fabrics

Buckles – buttons – clasps – etc. – Bale and package ties – hose clamps – With tighteners
Patent

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Locking hinge mechanism for a stepladder

Fire escape – ladder – or scaffold – Convertible – Ladder
Patent

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Multichambered pump for a vapor compression refrigeration system

Refrigeration – Processes – Compressing – condensing and evaporating
Patent

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Profile ID: LFUS-PAI-P-1328955

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