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Priority to AU37274/71ApriorityCriticalpatent/AU3727471A/en
Priority to IT6933972Aprioritypatent/IT969517B/it
Publication of AU3727471ApublicationCriticalpatent/AU3727471A/en
G03G15/00—Apparatus for electrographic processes using a charge pattern
G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
G03G15/225—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 using contact-printing
