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Subclass TR
| TR1-1050 | Photography | |
| TR250-265 | Cameras | |
| TR287-500 | Photographic processing. Darkroom technique | |
| TR504-508 | Transparencies. Diapositives | |
| TR510-545 | Color photography | |
| TR550-581 | Studio and laboratory | |
| TR590-620 | Lighting | |
| TR624-835 | Applied photography Including artistic, commercial, medical photography, photocopying processes | |
| TR845-899 | Cinematography. Motion pictures | |
| TR925-1050 | Photomechanical processes | |
