347 / | HD | INCREMENTAL PRINTING OF SYMBOLIC INFORMATION |
224 | DF | LIGHT OR BEAM MARKING APPARATUS OR PROCESSES {2} |
225 | DF | .~ Scan of light {12} |
226 | DF | .~.~ Cathode ray device {5} |
230 | .~.~.~ Having optical means interposed between the screen of the cathode ray device and the record receiver |