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Patent registration no. : 10-1079823
Transformer for lightning and noise prevention using iron tape with directional magnetic pole
Patent registration no. : 10-1081578
Electrical equipment panel with double shielding structure for lightning and electromagnetic protection
Patent registration no. : 10-1173507
Automatic power factor improvement system
Patent registration no. : 10-1178132
Magnetic shield panel
Patent registration no. : 10-1198031
Shielding transformers with multiple independent magnetic fields
Patent registration no. : 10-1201291
Reverse double winding combined transformer for electrostatic shielding, surge and noise prevention