4. Tools
  5. Wrench, screwdriver, or driver therefor
  6. Machine

Walter Marsch

Inventor

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Device for positioning anchorage means

Tools – Wrench – screwdriver – or driver therefor – Machine
Patent

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Tubular lost borehole closure

Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent

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Tubular one-way closure for injecting a material into a hole

Wells – Packers or plugs – With expanding anchor
Patent

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Profile ID: LFUS-PAI-P-1605657

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