Artificial islands and method of controlling ice movement in...

Artificial reef and beach stabilizer formed from an...

Artificial reef module & method

Artificial reef module and method

Assembly of conductor guides for offshore drilling platform

Automatic beaver dam water control "beaver deceiver"

Automatic fishlock

Automatic swing fishway apparatus

Auxiliary fish ladders

Bacterial composition for the recovery of oil-polluted water...

Ball joint for connecting a concrete tower carrying a...

Ballast system

Ballastable concrete base for an offshore platform

Bar screen cleaning device

Bar screen with improved rake wiping mechanism

Bar screen with screen cleaner for waste water treatment...

Bar screening apparatus for flowing streams of water and the...

Bar sieve system for liquids including fibrous substances

Barrage gonflable

Barrier device and method for building barrier wall