Downhill effect rotational apparatus and methods

Downhole electrical power generator

Downhole electrical submersible power generator

Drag responsive regulated voltage power generation

Drainwater/sewage treatment installation for producing electrica

Drive apparatus for hybrid vehicle

Drive apparatus for vehicle mounted generator

Drive control of hybrid electric vehicle

Drive control system for hybrid vehicles

Drive device

Drive for a windmill

Drive force control system for vehicles

Drive line for fluid flow power engine with speed guidance,...

Drive system and method for automotive vehicles, especially floo

Drive system for an electric generator

Drive system for an industrial truck and a method for the...

Drive system, electric machine for use in a drive system,...

Drive train for an immersion energy production system

Drive unit

Drive unit