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Irrigation pipe

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

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Irrigation process

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Irrigation regulator

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

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Irrigation system

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

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Irrigation system

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

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Irrigation system and associated methods

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

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Irrigation system and irrigation method

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Irrigation system and method

Hydraulic and earth engineering – Drainage or irrigation
Reexamination Certificate

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Irrigation systems

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Irrigation systems

Hydraulic and earth engineering – Drainage or irrigation
Patent

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Irrigation tubing

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

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Irrigation tubing with improved discharge holes

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

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Isolation of soil with a low temperature barrier prior to...

Hydraulic and earth engineering – Subterranean waste disposal – containment – or treatment – Waste barrier – containment – or monitoring
Reexamination Certificate

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