347 / | HD | INCREMENTAL PRINTING OF SYMBOLIC INFORMATION |
171 | DF | THERMAL MARKING APPARATUS OR PROCESSES {20} |
200 | DF | .~ Specific resistance recording element type {8} |
208 | .~.~ Specific conductor means (e.g., electrode, conducting pattern, etc.) {1} | |
209 | DF | .~.~.~> With means for driving or supplying current to the resistive heating elements {1} |