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Damming and barrier-forming device and method

Hydraulic and earth engineering – Drainage or irrigation
Patent

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De-watering system

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Decants of tailings dams

Hydraulic and earth engineering – Drainage or irrigation – Having regulation of flow through channel
Patent

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Deep root watering unit

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

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Desalting irrigation and its apparatus

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Detention pond water quality apparatus and system

Hydraulic and earth engineering – Drainage or irrigation – Having regulation of flow through channel
Reexamination Certificate

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Device for draining sandy ground areas

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Device for draining soils in depth

Hydraulic and earth engineering – Drainage or irrigation – Porous waterway – e.g. – sand drain – etc.
Patent

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Device for ensuring free water passage to roof rainwater outlets

Hydraulic and earth engineering – Drainage or irrigation – Control means responsive to sensed condition
Patent

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Device for inserting a drainage wick into the ground

Hydraulic and earth engineering – Drainage or irrigation – Porous waterway – e.g. – sand drain – etc.
Patent

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Device for preventing flooding caused by sprinkler failure

Hydraulic and earth engineering – Drainage or irrigation – Control means responsive to sensed condition
Patent

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Device for regulating the flow in a drainage siphon tube

Hydraulic and earth engineering – Drainage or irrigation – Porous waterway – e.g. – sand drain – etc.
Patent

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Device for soil irrigation

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

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Dike irrigation

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Downspout drain outlet

Hydraulic and earth engineering – Drainage or irrigation – End cap
Reexamination Certificate

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Drain apparatus

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Drain apparatus

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Drain board installing device without anchor plate

Hydraulic and earth engineering – Drainage or irrigation – Porous waterway – e.g. – sand drain – etc.
Reexamination Certificate

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Drain channel system

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Drain cover portion

Hydraulic and earth engineering – Drainage or irrigation
Reexamination Certificate

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