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

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

Portable irrigation pipe installation and removal system

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

Positively closing nozzle and method of use in underground irrig

Hydraulic and earth engineering – Drainage or irrigation

Post mounting assembly

Hydraulic and earth engineering – Drainage or irrigation

Post mounting assembly

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

Pressure compensating flow rate control device with dual operati

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

Process for forming notches in an irrigation lateral

Hydraulic and earth engineering – Drainage or irrigation

Process for forming watering notches in an irrigation ditch and

Hydraulic and earth engineering – Drainage or irrigation – Branched flow

Process for raising sunken sprinkler heads

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

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

Protective body/cover to be placed over discharge openings on pi

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