US PATENT SUBCLASS 400 / 120.01
.~ Thermal

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

118.2  DF  TYPING BY OTHER THAN TYPE-FACE OR TYPE-DIE {3}
120.01.~ Thermal {7}
120.02  DF  .~.~> Multicolor {2}
120.05  DF  .~.~> Block driving {1}
120.07  DF  .~.~> Gradational recording
120.08  DF  .~.~> Preheating
120.09  DF  .~.~> Density control {6}
120.16  DF  .~.~> Recording means support or actuator {1}
120.18  DF  .~.~> Pre- or post-image recording treatment

DEFINITION

Classification: 400/120.01

Thermal:

(under subclass 118.2) Subject matter wherein a recording means, due to its being in a heated condition, produces a record upon the record-medium* as by reason of the medium becoming scorched, burned, marked, or otherwise thermochemically changed.