US PATENT SUBCLASS 400 / 498
.~ Including prevention of full imprint on "carbon copy" record-medium

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

497  DF  WITH CONTROL OF "CARBON PAPER" FOR TYPING PLURAL SIMULTANEOUS COPIES BY SINGLE IMPRESSION (E.G., ON "MANIFOLD SET") {10}
498.~ Including prevention of full imprint on "carbon copy" record-medium

DEFINITION

Classification: 400/498

Including prevention of full imprint on "carbon copy" record-medium:

(under subclass 497) Subject matter wherein significance is attributed to the interposition of a shield or barrier between said carbon paper and said carbon copy at selected portions of a print-line*, whereby said selected portions will not be imprinted on the carbon copy.