Auxiliary power units for supplying electrical power to heat and power generators; Electric generators and related equipment, namely, automatic standby electric generator sets; Gas-operated power generators; Natural gas fired generators; Generators for land vehicles; Electric power generators for marine and locomotive vehicles; Internal combustion engines for power generation, other than for marine or land vehicles; Electricity generators that may also be used as electric motors for vehicles;...

electrical power generation equipment, namely, fuel cells, proton exchange membrane fuel cells, fuel cell stacks, and fuel cell systems and components for stationary and portable electric power generation comprised of fuel cell stacks and fuel processors to produce fuel streams for the fuel cell stacks