• All sections
• G - Physics
• G03B - Apparatus or arrangements for taking photographs or for projecting or viewing themapparatus or arrangements employing analogous techniques using waves other than optical wavesaccessories therefor
• G03B 27/47 - Projection printing apparatus, e.g. enlarger, copying camera for automatic sequential copying of different originals, e.g. enlargers, roll film printers at different positions of the same sheet, e.g. microfiche

Patent holdings for IPC class G03B 27/47

Total number of patents in this class: 0

10-year publication summary

Principal owners for this class