Thermoelectric devices without a junction of dissimilar materials; Thermomagnetic devices, e.g. using Nernst-Ettinghausen effect; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof using thermal change of dielectric constant, e.g. working above and below Curie point {, e.g. pyroelectric devices}
Thermoelectric devices without a junction of dissimilar materials; Thermomagnetic devices, e.g. using Nernst-Ettinghausen effect; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof using thermal change of dielectric constant, e.g. working above and below Curie point {, e.g. pyroelectric devices}