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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13/00
Electrographic processes using a charge pattern
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G03G13/04
Exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
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G03G13/045
Charging or discharging distinct portions of the charge pattern on the recording material, e.g. discharging non-image areas or contrast enhancement
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