US PATENT SUBCLASS 400 / 523
.~ On card pierced or indented to aid holding

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

521  DF  FOR TYPING ON CARD IN CARD HOLDER {11}
523.~ On card pierced or indented to aid holding

DEFINITION

Classification: 400/523

On card pierced or indented to aid holding:

(under subclass 521) Subject matter wherein the retaining means has projections thereon that enter into, or cause the formation of, holes or depressions in the surface of the record-medium* card, whereby the card is more securely retained by the retaining means.