US PATENT SUBCLASS 400 / 240.4
.~.~.~ Including more than two fields
Current as of:
June, 1999
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400 /
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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.
