| Subclass 01 | Keyboard instruments |
| A0017 | Accordions | A0030 | T0029 |
| C0595 | Concertinas | C0731 | H0097 |
| H0097 | Harmoniums | H0025 | H0098 |
| K0016 | Keyboard instruments | M0372 | B0138 |
| K0020 | Keyboards for musical instruments | C0606 | B0140 |
| K0023 | Keys for musical instruments | T0285 | B0137 |
| M0118 | Mechanical pianos | P0274 | M0078 |
| M0306 | Musical instruments (Keys for –) | T0285 | B0137 |
| M0307 | Musical instruments (Pedals for –) | P0176 | P0125 |
| O0038 | Organ pipes | T0433 | O0058 |
| O0039 | Organ stops | R0138 | O0057 |
| O0040 | Organs | O0063 | O0059 |
| P0127 | Pedals for musical instruments | P0176 | P0125 |
| P0207 | Pianos | P0273 | Z0035 |
| P0208 | Pianos (Mechanical –) | P0274 | M0078 |
| P0209 | Pianos (Sound boards for –) | T0045 | R0088 |
| P0259 | Pipes (Organ –) | T0433 | O0058 |
| S0540 | Sound boards for pianos | T0045 | R0088 |
| S0775 | Stops (Organ –) | R0138 | O0057 |
| Subclass 02 | Wind instruments |
| B0024 | Bagpipes | C0808 | D0133 |
| B0138 | Bassoons | B0136 | F0006 |
| B0564 | Bugles | C0588 | K0697 |
| C0419 | Clarinets | C0590 | K0465 |
| C0681 | Cornets [musical instruments] | C0817 | S0307 |
| E0108 | Euphoniums | S0087 | B0023 |
| F0250 | Flutes | F0195 | F0328 |
| H0096 | Harmonicas | H0024 | S0263 |
| H0245 | Horns [musical instruments] | C0823 | K0698 |
| H0283 | Hunting horns | C0825 | V0001 |
| K0003 | Kazoos | M0234 | N0028 |
| M0281 | Mouth organs | H0024 | S0263 |
| M0308 | Musical instruments (Wind –) | I0064 | F0329 |
| O0002 | Oboes | H0033 | O0001 |
| O0005 | Ocarinas | O0008 | O0003 |
| O0043 | Organs (Mouth –) | H0024 | S0263 |
| P0210 | Piccolos | P0276 | P0156 |
| R0131 | Reeds for musical instruments | A0191 | S0125 |
| S0077 | Saxophones | S0088 | S0261 |
| T0388 | Trombones | T0380 | P0276 |
| T0404 | Trumpets [musical instruments] | T0382 | T0434 |
| W0161 | Wind instruments | I0064 | F0329 |
| Subclass 03 | Stringed instruments |
| B0054 | Balalaikas | B0050 | B0014 |
| B0090 | Banjos | B0096 | B0061 |
| B0415 | Bows for musical instruments | A0270 | V0280 |
| C0341 | Chin rests (Violin –) | M0163 | Á0037 |
| D0233 | Double bass | C0772 | N0007 |
| D0334 | Dulcimers | T0442 | K0455 |
| G0198 | Guitars | G0199 | G0078 |
| H0105 | Harps | H0029 | H0117 |
| M0025 | Mandolins | M0059 | M0021 |
| P0138 | Pegs for stringed instruments | C0519 | H0074 |
| S0824 | Stringed instruments | I0062 | H0290 |
| T0433 | Tuning pegs for stringed instruments | C0519 | H0074 |
| U0001 | Ukuleles | U0001 | H0103 |
| V0087 | Violin chin rests | M0163 | Á0037 |
| V0088 | Violins | V0122 | H0146 |
| V0089 | Violoncellos | V0121 | G0097 |
| Z0005 | Zithers | C0584 | C0075 |
| Subclass 04 | Percussion instruments |
| B0201 | Bells | C0622 | H0087 |
| B0205 | Bells (Small –) | C0627 | C0140 |
| B0206 | Bells (Small globular –) | G0162 | K0449 |
| B0233 | Big drums [musical instruments] | G0181 | N0008 |
| C0129 | Carillons | C0167 | H0085 |
| C0227 | Castanets | C0262 | K0140 |
| C0335 | Chimes | C0167 | H0085 |
| C0880 | Cymbals | C1082 | C0042 |
| D0323 | Drum sticks (Bass –) | M0024 | B0029 |
| D0326 | Drums [musical instruments] | T0079 | D0079 |
| G0140 | Gongs | G0129 | G0096 |
| K0011 | Kettledrums | T0202 | Ü0014 |
| M0045 | Marimbas | M0087 | M0031 |
| P0170 | Percussion instruments | I0063 | Ü0027 |
| T0051 | Tambourines | T0078 | T0026 |
| T0362 | Triangles [musical instruments] | T0360 | T0426 |
| X0005 | Xylophones | X0001 | X0001 |
| Subclass 05 | Mechanical instruments |
| B0103 | Barrel organs | O0064 | K0441 |
| B0260 | Birds (Mechanical singing –) | O0027 | M0146 |
| B0438 | Boxes (Music –) | B0308 | Z0030 |
| C0046 | Calliopes [musical instruments] | C0089 | S0123 |
| M0117 | Mechanical musical instruments | I0065 | Z0031 |
| M0119 | Mechanical singing birds | O0027 | M0146 |
| M0302 | Music boxes | B0308 | Z0030 |
| O0041 | Organs (Barrel –) | O0064 | K0441 |
| S0390 | Singing birds (Mechanical –) | O0027 | M0146 |
| Subclass 99 | Miscellaneous |
| B0156 | Batons (Conductors' –) [music] | B0021 | K0109 |
| C0602 | Conductors' batons [music] | B0021 | K0109 |
| D0005 | Dampers for musical instruments | S0328 | H0081 |
| M0310 | Mutes for musical instruments | S0328 | H0081 |
| T0432 | Tuning forks | D0138 | H0084 |
| T0434 | Tuning whistles | S0234 | H0075 |
| W0156 | Whistles (Tuning –) | S0234 | H0075 |
| WIPO Locarno Classification - Class 17 |