B41B21/00 - CPC Classification

Common details of photographic composing machines of the kinds covered in groups and

• B41B21/02 » Shutters in optical systems 0
• B41B21/08 » Light sources; Devices associated therewith, e.g. control devices 0
• B41B21/16 » Optical systems 0
• B41B21/30 » Electron-beam tubes or charactrons 0
• B41B21/32 » Film carriers; Film-conveying or positioning devices 0