4. Hydraulic and earth engineering
  5. Drainage or irrigation
  6. Porous or apertured pipe, flume, or tileway
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Highway edgedrain

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Hillslope landslide stability drain

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Horizontal dewatering system

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Horizontally draining artificial turf system

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Hose conduits for drip- or trickle emission

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

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