Patent classifications
G
PHYSICS
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G03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
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G03G
ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
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15/00
Apparatus for electrographic processes using a charge pattern
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G03G15/22
involving the combination of more than one step according to groups G03G13/02 - G03G13/20
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G03G15/221
Machines other than electrographic copiers, e.g. electrophotographic cameras, electrostatic typewriters
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G03G15/224
Machines for forming tactile or three dimensional images by electrographic means, e.g. braille, 3d printing
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