Adjustable draft tube

Air flow check valve and system incorporating the same

Air turbine with power controller having operation independent o

Airtrap power generator

Altitude gas pressure differential power plant

Apparatus and method for generating energy

Apparatus for aerial water acquisition and sub-sea aqueduct

Apparatus for conversion of energy from the vertical...

Apparatus for deriving energy from variation of the level of a b

Apparatus for extracting energy from water waves

Apparatus for extracting energy from wave motion

Apparatus for extracting power from a fluid flow

Apparatus for generating energy from the rise and fall of tides

Apparatus for generating high pressure fluid in response to wate

Apparatus for generating high pressure water in response to wate

Apparatus for harnessing tidal power

Apparatus for harnessing tidal power

Apparatus for obtaining energy from wave motion

Apparatus for preventing blowing out of the water supply of cons

Apparatus for wave power generation utilizing large mass dynamic