GreenMan Technologies' Subsidiary Commissions Dual Fuel Technology to Power Cimarex Energy Co. Oil & Gas Drilling Rig Site Using Pipeline Gas LYNNFIELD, MA--(Marketwire - Jul 27, 2011) - GreenMan Technologies, Inc. (OTCQB: GMTI) (PINKSHEETS: GMTI) announced that its American Power Group, Inc. subsidiary ("APG") has converted and...