US PATENT SUBCLASS 400 / 206.4
.~.~.~ On single spool

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}
204  DF  .~ For typing plural copies simultaneously with ribbon(s) (e.g., duplicate typing) {2}
206  DF  .~.~ Using plural ribbons (e.g., additional ribbon(s) {4}
206.4.~.~.~ On single spool

DEFINITION

Classification: 400/206.4

On single spool:

(under subclass 206) Subject matter wherein at least one ribbon*-receiving reel is provided to mount the ribbons on the typewriter, and wherein more than one ribbon is convoluted on a single reel.