US PATENT SUBCLASS 79 / 14
.~.~.~ Single chuck

Current as of: June, 1999
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79 /   HD   BUTTON MAKING

*  DD  PEARL AND COMPOSITION {4}
*  DD  .~ Drilling {2}
*  DD  .~.~ Single spindle {1}
14.~.~.~ Single chuck

DEFINITION

Classification: 79/14

Button-drilling machines having but a single drill-spindle and a single chuck for holding the button.