LandOfFree - US Patents - Listing for Hydraulic and earth engineering,Drainage or irrigation,Porous waterway, e.g., sand drain, etc.

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

Low cost installation of columns of material

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

Means for providing a vertical drain in soil

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

Means for providing a vertical drain in soil

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

Method and apparatus for enhancement of prefabricated earth...

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

Method and apparatus for laying drains in frost-susceptible grou

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

Method and apparatus of forming sand piles for improving a soft

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

Method and device for inserting a drainage wick

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

Method for improving soft ground by sand drain method and cylind

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

Method of confirming position of drain material left and apparat

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

Multi-use fluid collection and transport apparatus

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

Polystyrene beads for drainage fields

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

Procedure and means for creating a vertical drain

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

Procedure and means for providing a vertical drain in the bottom

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

Protective waterproofing membrane, particularly for coatings of

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

Public works machine usable more particularly for laying vertica

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

Soil filtration and water drainage device

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

Structural modular interconnectable subsoil drainage cell

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

Subsurface drainage system and drain structure therefor

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

Subsurface drainage system and drain structure therefor