starter motors; engines and motors for the generation of electricity; agitators for circulating liquid media; conveyors; machines for gas utilization and gas disposal, in particular flare installations; catalytic converters; electric generators; compressors for machines; gas and steam turbines; [ engines and motors for model vehicles, aircraft and boats, namely, combustion engines; ] transmission gears for machines, namely, couplings, gear wheels, gears, shafts, belt and chain drives; machines and installations, namely, fermenters, namely, continuous-flow fermenter [ sand mine storage fermenters ]; [ electric egg beaters; ] waste crushing machines; regulators being part of machines; agricultural machines, namely, machines and installations for the production of raw materials for extracting biogas; endless screws for moving solids; heat exchangers being part of machines; starter alternators; heat exchangers being part of machines; centrifugal grinding machines; [ fuel pumps for land vehicles and water pumps for land vehicles; ] agitators, namely, agitators for biogas installations, large-blade agitators; submersible motor-driven agitators paddle agitators; machine crushers, namely, crushers for crushers substrates for biogas installations; machines for automatic dosing of solids; gas condensers

electric controls for machines and engines, namely, electric generators; secondary fermenters, controlled volume pumps; machines for dispensing pre-determined dosages of medication; fuel cells for hydrogen, natural gas, sewage gas, biogas, landfill gas and hydrocarbon vapors

water pumps; heating systems comprised primarily of tubes, pipes and pre-assembled manifolds through which cold or low temperature water circulates; refrigerating machines; [ electric clothes drying machines for household purposes; ] heat sinks for use in heating, cooling and ventilating apparatus; boiler machines, namely, heating, steam, waste and gas boiler machines; and steam generators; gas desulfurization installations, namely, gas desulfurization installations comprising desulfurizing bacteria; water purification installations for waste water and sewage consisting of curtains and textile fabrics; flare stacks for use in release of gases; waste water sewage purification units; steam boilers; gas burners for industrial, commercial and domestic use; electrochemical gas generators; gas boilers; electro-chemical flue gas scrubbing machines; air purification units; regulating accessories for water supply, namely, metered valves and pipes; evaporators for chemical processing; hydro-generation equipment and components, namely, hydrogen generators, hydrogen purifiers, hydrogen purification membranes, fuel processors and steam reformers; block-type thermal power plants; gas regulators; equipment for the utilization of biogas, namely, gas burners, heating apparatus, heating installations, block-type thermal power stations, heat pumps, heat regenerators, heat accumulators and heat exchangers; waste treatment installations for substrates fermented in biogas installations