LandOfFree - US Patents - Listing for Hydraulic and earth engineering,Drainage or irrigation

Hydraulic and earth engineering – Drainage or irrigation

Open top drain

Hydraulic and earth engineering – Drainage or irrigation

Optimum water retention system for use in agricultural fields

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

Orifice shield for a drainage conduit in a wastewater...

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

Orifice shield for drainage pipe

Hydraulic and earth engineering – Drainage or irrigation – End cap

Outwardly dished end plate for stormwater chamber

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

Partial-seepage drainage pipe with mating sleeve

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

Perforated drainpipe for railway decks

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

Permeable conduits for disbursing fluids

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

Pipe assembly for collecting surface water runoff and...

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

Pipe couplings for irrigation systems

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

Pipe for underdraining

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

Pipe for watering plants

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

Planted surface moisture control system

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

Planted surface moisture control system

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

Plastic corrugated drainage pipe

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

Plastic sewage pipe

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

Plastic underdrainage tube

Hydraulic and earth engineering – Drainage or irrigation

Playground construction

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

Polystyrene beads for drainage fields