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

Boyd H. Grayson

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Apparatus for attaching a lifting mechanism to a load

Handling: hand and hoist-line implements – Grapple – Lewises
Patent

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Pre-cast panel lifting insert

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

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Retaining wall anchor system

Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Patent

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Profile ID: LFUS-PAI-P-712109

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