US PATENT SUBCLASS 347 / 142
.~.~.~ Signal switching

Current as of: June, 1999
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347 /   HD   INCREMENTAL PRINTING OF SYMBOLIC INFORMATION

111  DF  ELECTRIC MARKING APPARATUS OR PROCESSES {3}
112  DF  .~ Electrostatic {8}
141  DF  .~.~ Specific electrostatic head {7}
142.~.~.~ Signal switching {3}
143  DF  .~.~.~.~> Amplitude modulation
144  DF  .~.~.~.~> Time based modulation (e.g., pulse width, duty cycle, rise time)
145  DF  .~.~.~.~> Block driving

DEFINITION

Classification: 347/142

Signal switching:

(under subclass 141) Subject matter comprising a circuit interrupter for selectively energizing a plurality of electrodes in accordance with the image signal.