IC 009. US 021 023 026 036 038. G & S: electric or electronic control or regulating apparatus and instruments, namely, controls for regulating or controlling electric current in heat pumps; power electronic devices, apparatuses and instruments for switching, converting, regulating and controlling electricity

IC 011. US 013 021 023 031 034. G & S: installations for use of energy, storage of energy and conversion of energy, namely, heating devices in the nature of heat pumps, vapor generating devices comprised primarily of heat pumps, cooling devices comprised primarily of heat pumps, drying and ventilating devices comprised primarily of heat pumps, heat pumps, evaporators for heat pumps, liquefiers for heat pumps

IC 037. US 100 103 106. G & S: maintenance of technical installations for use of energy in the nature of installations for the purpose of heating, vapor generation, cooling, drying, ventilation, storage of energy and conversion of energy, namely, heat pumps, vapor generators, coolers, dryers, ventilators, energy storages and energy converters

IC 042. US 100 101. G & S: development of technical installations for use of energy, in the nature of installations for the purpose of heating, vapor generation, cooling, drying, ventilation, storage of energy and conversion of energy, namely, heat pumps, vapor generators, coolers, dryers, ventilators, energy storages and energy converters