US PATENT SUBCLASS 400 / 240.4
.~.~.~ Including more than two fields


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}
240  DF  .~.~ Including differently pigmented fields {4}
240.4.~.~.~ Including more than two fields


DEFINITION

Classification: 400/240.4

Including more than two fields:

(under subclass 240) Subject matter wherein the ribbon* has at least three zones.