347 / | HD | INCREMENTAL PRINTING OF SYMBOLIC INFORMATION |
111 | DF | ELECTRIC MARKING APPARATUS OR PROCESSES {3} |
112 | DF | .~ Electrostatic {8} |
115 | .~.~ Multicolor {3} | |
116 | DF | .~.~.~> Registration |
117 | DF | .~.~.~> Plural heads {1} |
119 | DF | .~.~.~> Single head using light as exposure means |