4. Hydraulic and earth engineering
  5. Earth treatment or control
  6. Shoring, bracing, or cave-in prevention

Hugh E. Cooper

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Body support apparatus

Chairs and seats – Armrest – Attachable to diverse chairs or seats; i.e. – portable
Patent

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Foldable tillage implement

Earth working – Plural wheeled implements – Outrigged implement adjustable inwardly
Patent

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Safety shield for an excavation trench

Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent

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Profile ID: LFUS-PAI-P-767583

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