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

Hydraulic and earth engineering – Drainage or irrigation

Apparatus for deploying a work object

Hydraulic and earth engineering – Drainage or irrigation

Apparatus for draining land areas with an adjustable system...

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

Apparatus for inserting prefabricated vertical drains into the e

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

Apparatus for placement of lateral drain lines onto a main drain

Hydraulic and earth engineering – Drainage or irrigation

Apparatus for preventing contamination of a fresh water...

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

Apparatus for soil irrigation

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

Apparatus for treating soil

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

Apparatus for watering and draining soil

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

Aquifer recharge valve and method

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

Aquifer recharge valve and method

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

Arch conduit

Hydraulic and earth engineering – Drainage or irrigation

Arrangement for damming water and also for draining away the vol

Hydraulic and earth engineering – Drainage or irrigation

Arrangement for draining liquid collecting on a ground surface

Hydraulic and earth engineering – Drainage or irrigation – Branched flow

Arrangement in a drain system and a method for taking care...

Hydraulic and earth engineering – Drainage or irrigation

Assembly and method for joining a drain pipe and a catch basin

Hydraulic and earth engineering – Drainage or irrigation

Assembly and method for joining drain pipe to concrete catch...

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

Athletic field construction

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

Automated air handling system for sports field

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

Auxiliary drainage system for eliminating water problems associa