US PATENT SUBCLASS 347 / 136
.~.~.~.~.~ Shutter device

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}
129  DF  .~.~ Photo scanning {7}
134  DF  .~.~.~ Optical elements interposed between record receiver and beam generator {2}
135  DF  .~.~.~.~ Light intensity modulation means {1}
136.~.~.~.~.~ Shutter device

DEFINITION

Classification: 347/136

Shutter device:

(under subclass 135) Subject matter wherein the electrically variable optically transmission element either passes or blocks the light beam in a binary manner.