361, Electricity: Electrical Systems and Devices, subclass 77 for reverse phase responsive protective systems, subclasses 78+ for reverse energy or current, and subclass 208 for polarized electromagnets with circuits.
(Electrical Systems and Devices; subclass; 77 for reverse phase responsive protective systems, subclasses) (Electrical Systems and Devices; subclass; 208; for polarized electromagnets with circuits)
Electrical Systems and Devices Electrical Systems and Devices
subclass subclass
77 for reverse phase responsive protective systems, subclasses
208 for polarized electromagnets with circuits