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

Paul R. Tufts

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Concrete block with batter indicators

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

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Retaining wall block system

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

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System of blocks for use in forming a free standing wall

Static structures (e.g. – buildings) – Laterally related – individually assembled courses
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2877919

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