LandOfFree - US Patents - Listing for Hydraulic and earth engineering,Drainage or irrigation,Porous or apertured pipe, flume, or tileway

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

Open top drain

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 – 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 – 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 – Porous or apertured pipe – flume – or tileway

Porous pipe and apparatus and method of producing the same

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

Porous tubes and hollow profile structures and method of making

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

Prefabricated vertical earth drain and method of making the same

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

Prefabricated vertical earth drain with relief protrusions

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

Process for the construction of a drain system

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

Production of PVC irrigation pipe and the pipe so produced

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

Profile elements, particularly for supply and/or removal of subs