US PATENT SUBCLASS 400 / 538
.~.~ Transparent card holder

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

521  DF  FOR TYPING ON CARD IN CARD HOLDER {11}
536  DF  .~ Card holder mounted on typewriter frame {3}
538.~.~ Transparent card holder

DEFINITION

Classification: 400/538

Transparent card holder:

(under subclass 536) Subject matter wherein significance is attributed to a retaining means that is made of a material through which light may pass, whereby a typist is enabled to see the print-line* on the record-medium* as the character* symbols are being imprinted.