9 Electrical and electronic apparatus and equipment all for use in generating energy obtained from thermionic energy sources in the nature of thermoelectric generators; Electrical and electronic apparatus and equipment all for use in harvesting energy obtained from thermionic energy sources in the nature of thermoelectric generators; Apparatus for converting thermal energy to electrical energy, namely, thermoelectric converters; Apparatus for converting thermal energy to electrical energy, namely, thermoelectric harvesting modules; Thermoelectric collection apparatus, namely, thermal collection modules for production of electricity; and apparatus for thermal energy harvesting, namely, apparatus for converting thermal energy to electrical energy, namely, thermoelectric modules and converters; thermoelectric generators; thermionic power generators in the nature of thermoelectric generators