77331192
Nov 16, 2007
Sep 29, 2009
Accumulators and batteries, battery monitoring and indicating apparatus, specifically, sensors for current, voltage and cycle number, and displays for battery charge state and capacity; battery charging apparatus, AC/DC and DC/AC converters, switching apparatus for automated selection of line or battery power sources; back-up electrical power systems comprised of batteries, controller and charging unit, sold together as a unit, electrical emergency warning lights
Electrical and Scientific ApparatusElectrical safety lighting installations, specifically, backup safety lighting installations for use during power failures, lights with their own electrical power source, specifically, battery-powered lamps
Environmental Control Apparatus