HydraForce Inc.

Hydratron Fuels, Inc.

Hydraulic Impulse Controls, Inc.

Hydraulic Industries, Inc.

Hydraulic Servocontrols Corporation

Hydraulic Tool Engineering, Inc.

Hydraulic-Ring Antriebs-und Steuerungstechnik GmbH

Hydraulik-Ring Antriebs- und Steueringstechnik GmbH

Hydrino AB

Hydris

Hydro Electronic Devices Inc. (HED)

Hydro International PLC

Hydro International plc

Hydro Mix, Inc.

Hydro Pulse, Inc.

Hydro Systems Company

Hydro-Flo Holdings PTY LTD

Hydro-Flo Holdings Pty Ltd.

Hydro-Industries Tynat Ltd.

Hydro-Pulse, Inc.