| Subclass 01 | Generators and motors |
| D0348 | Dynamos | D0254 | D0050 |
| G0079 | Generators, electric | G0068 | E0073 |
| M0267 | Motors, electric | M0314 | E0099 |
| R0286 | Rotors of electric motors and generators | R0259 | E0098 |
| S0708 | Stators of electric motors and generators | S0364 | E0097 |
| Subclass 02 | Power transformers, rectifiers, batteries and accumulators |
| A0021 | Accumulator charging apparatus | R0110 | A0080 |
| A0022 | Accumulator jars | B0007 | A0076 |
| A0023 | Accumulator plates | P0442 | A0079 |
| A0025 | Accumulators, electric | A0036 | E0058 |
| A0026 | Accumulators (Grids for –) | G0168 | A0078 |
| B0159 | Batteries (Dry –) | P0314 | S0297 |
| B0160 | Batteries, electric | B0159 | E0064 |
| B0161 | Battery boxes for portable telephones | B0339 | A0075 |
| B0162 | Battery charger housings | B0340 | E0139 |
| B0164 | Battery plates | P0442 | A0079 |
| C0306 | Charging apparatus (Accumulator –) | R0110 | A0080 |
| C0529 | Coils (Ignition –) for motors | B0275 | G0195 |
| C0530 | Coils (Induction –) | B0279 | S0470 |
| C0531 | Coils (Self-induction –) | B0278 | Ö0019 |
| C0818 | Current rectifiers | R0124 | Á0074 |
| D0327 | Dry batteries | P0314 | S0297 |
| E0042 | Electrical chargers for telephones | C0371 | E0113 |
| E0046 | Electrifying apparatus for cattle fences | M0246 | E0070 |
| F0053 | Fences (Electrifying apparatus for cattle –) | M0246 | E0070 |
| G0172 | Grids for accumulators | G0168 | A0078 |
| I0026 | Ignition coils for motors | B0275 | G0195 |
| I0046 | Induction coils | B0279 | S0470 |
| J0008 | Jars (Accumulator –) | B0007 | A0076 |
| P0303 | Plates (Accumulator –) | P0442 | A0079 |
| P0422 | Power supply units, universal | B0256 | Á0071 |
| R0111 | Rechargeable batteries | P0316 | U0012 |
| R0127 | Rectifiers (Current –) | R0124 | Á0074 |
| R0171 | Regulators (Voltage –) | R0150 | F0137 |
| S0172 | Self-induction coils | B0278 | Ö0019 |
| S0726 | Step-down and step-up transformers | D0129 | K0497 |
| S0729 | Step-up and step-down transformers | D0129 | K0497 |
| T0124 | Telephones (Battery boxes for portable –) | B0339 | A0075 |
| T0125 | Telephones (Electrical chargers for –) | C0371 | E0113 |
| T0321 | Transformers | T0332 | T0418 |
| V0093 | Voltage regulators | R0150 | F0137 |
| Subclass 03 | Equipment for distribution or control of electric power |
| A0031 | Adapters for electrical connector sockets | A0049 | E0093 |
| B0416 | Bows, overhead sliding, for electric locomotives | A0269 | Á0078 |
| B0433 | Boxes (Junction –) [electricity] | B0324 | E0051 |
| B0479 | Branch boxes [electricity] | B0324 | E0051 |
| C0018 | Cable clips [electricity] | S0178 | K0164 |
| C0022 | Cables, electric | C0019 | E0087 |
| C0085 | Capacitors | C0732 | E0092 |
| C0091 | Caps (Marking –) [electricity] | F0099 | J0070 |
| C0406 | Circuit breakers | C0854 | Á0075 |
| C0457 | Clips (Cable –) [electricity] | S0178 | K0164 |
| C0604 | Conductors, electric | C0737 | E0121 |
| C0605 | Conductors (Identification sheaths for electric –) | G0011 | A0197 |
| C0607 | Conduits [electricity] | C0742 | E0115 |
| C0614 | Connecting plugs for coaxial cables | F0097 | C0116 |
| C0616 | Connections (Switchboards for electric –) | T0015 | E0086 |
| C0617 | Connectors [electricity] | C0750 | E0094 |
| C0622 | Contact breakers | R0305 | Á0076 |
| C0623 | Contact plugs | F0096 | D0140 |
| C0624 | Contact poles [e.g. for tramcars] | P0222 | Á0079 |
| C0637 | Control of electric power (Equipment for –) | C0686 | E0125 |
| C0638 | Control panels [electricity] | T0017 | E0083 |
| C0714 | Covers for electric switches | C0948 | E0126 |
| C0843 | Cut-outs | D0155 | K0442 |
| D0029 | Decorative fittings for electric switches and sockets | E0175 | D0058 |
| D0170 | Distribution boards [electricity] | T0017 | E0083 |
| D0171 | Distribution of electric power (Equipment for –) | D0200 | E0124 |
| E0038 | Electric conductors (Identification sheaths for –) | G0011 | A0197 |
| E0045 | Electrified rails for mounting spot lights | R0046 | E0118 |
| E0047 | Electrodes | E0105 | E0054 |
| F0374 | Fuse holders | P0650 | B0155 |
| F0375 | Fuse terminals [electricity] | P0410 | B0156 |
| F0376 | Fuses [electricity] | F0310 | E0060 |
| H0273 | Housings for electric conductors | G0008 | E0116 |
| I0022 | Identification sheaths for electric conductors | G0011 | A0197 |
| I0083 | Insulators [electricity] | I0082 | S0453 |
| J0047 | Junction boxes [electricity] | B0324 | E0051 |
| L0148 | Light dimmers | V0025 | L0070 |
| M0054 | Marking caps [electricity] | F0099 | J0070 |
| P0061 | Pantographs for electric locomotives or trams | P0052 | Á0077 |
| P0337 | Plugs (Connecting –) for coaxial cables | F0097 | C0116 |
| P0338 | Plugs (Contact –) | F0096 | D0140 |
| P0399 | Potentiometers | P0716 | P0240 |
| P0421 | Power points [electricity] | P0778 | D0134 |
| R0128 | Reducers [electricity] | R0125 | V0196 |
| R0176 | Relays, electric | R0154 | E0103 |
| R0192 | Resistance boxes [electricity] | B0330 | E0066 |
| R0193 | Resistances [electricity] | R0196 | E0065 |
| R0204 | Rheostats | R0216 | R0067 |
| S0017 | Safety covers for electric sockets | C0029 | B0145 |
| S0234 | Sheathing for electric conductors | M0056 | E0120 |
| S0237 | Sheaths (Identification –) for electric conductors | G0011 | A0197 |
| S0474 | Sliding (Bows, overhead –) for electric locomotives | A0269 | Á0078 |
| S0511 | Sockets [electricity] | P0778 | D0134 |
| S0514 | Sockets (Safety covers for electric –) | C0029 | B0145 |
| S0605 | Spot lights (Electrified rails for mounting –) | R0046 | E0118 |
| S0639 | Stabilizers [electricity] | S0355 | S0171 |
| S0909 | Switchboards for electric connections | T0015 | E0086 |
| S0911 | Switches (Covers for electric –) | C0948 | E0126 |
| S0912 | Switches [electricity] | C0693 | E0085 |
| T0151 | Terminals [electricity] | B0366 | E0112 |
| T0152 | Terminals (Fuse –) [electricity] | P0410 | B0156 |
| T0452 | Two-way switches | V0003 | K0359 |
| W0195 | Wire connectors [electricity] | S0180 | E0063 |
| W0202 | Wires (Insulated electric –) | F0135 | S0457 |
| Subclass 99 | Miscellaneous |
| C0253 | Cells (Solar –) | C0283 | N0014 |
| E0049 | Electro-magnets | E0103 | E0055 |
| M0015 | Magnets (Electro- –) | E0103 | E0055 |
| S0520 | Solar cells | C0283 | N0014 |
| WIPO Locarno Classification - Class 13 |