4. Road structure, process, or apparatus
  5. Drain or gutter

Wolfgang Arm

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Drainage gutter and method of installing

Road structure – process – or apparatus – Drain or gutter
Patent

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Means for securing a cover over a drainage channel

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Securing device for a drainage channel

Hydraulic and earth engineering – Drainage or irrigation – Porous or apertured pipe – flume – or tileway
Reexamination Certificate

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Surface drainage apparatus

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Surface drainage apparatus

Road structure – process – or apparatus – Drain or gutter
Patent

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Profile ID: LFUS-PAI-P-946212

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