US PATENT SUBCLASS 400 / 120.07
.~.~ Gradational recording

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  DF  .~ Thermal {7}
120.07.~.~ Gradational recording

DEFINITION

Classification: 400/120.07

Gradational recording:

(under subclass 120.01) Subject matter wherein the shading of the produced record varies.