Equipment for metering, monitoring, communication control and billing, between electric power and gas providers and their customers, namely, utility meter encoders; gas meter encoders; universal controllers; telephone to power-line carrier gateways; utility meter concentrators; load management controllers; power line modems; utility interface units; utility meter interface modules; power management hardware, namely power sensor, power line interrupters, power controllers; electric meters; gas meters; automated meter readers; automated meter reading computer hardware and software, supervisory control and data acquisition computer hardware and software, on-line remote billing meters, on-line remote billing computer hardware and software; automated energy use controllers; appliance load-monitors and controllers; network transducers; power line transceivers
Electrical and Scientific ApparatusFurnaces; heat exchangers; ventilating fans for commercial and industrial use; and water heaters for commercial, industrial and domestic use
Environmental Control Apparatus