G PHYSICS
G03 PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03G ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
15/00 Apparatus for electrographic processes using a charge pattern
G03G15/14 for transferring a pattern to a second base
G03G15/16 of a toner pattern, e.g. a powder pattern; , e.g. magnetic transfer