US PATENT SUBCLASS 400 / 241
.~.~ Particular ribbon material


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

191  DF  INCLUDING INTERPOSED INKING DEVICE (E.G., RIBBON) FOR RECORD-MEDIUM {15}
237  DF  .~ Ribbon, per se {4}
241.~.~ Particular ribbon material {3}
241.1  DF  .~.~.~> Synthetic material {1}
241.3  DF  .~.~.~> Particular weave pattern
241.4  DF  .~.~.~> Including ink-impervious backing for ribbon


DEFINITION

Classification: 400/241

Particular ribbon material:

(under subclass 237) Subject matter wherein significance is attributed to the substance from which the ink*-carrying portion of the ribbon* is made.