US PATENT SUBCLASS 347 / 251
.~.~ Tone marking

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

224  DF  LIGHT OR BEAM MARKING APPARATUS OR PROCESSES {2}
225  DF  .~ Scan of light {12}
251.~.~ Tone marking {3}
252  DF  .~.~.~> By adjusting pulse width of light beam
253  DF  .~.~.~> By varying intensity of light beam
254  DF  .~.~.~> By varying dotting density

DEFINITION

Classification: 347/251

Tone marking:

(under subclass 225) Subject matter comprising means for producing a halftone or grey scale image on the record receiver by controlling the amount of light irradiating a given location on the record receiver.