US PATENT SUBCLASS 79 / 9
.~.~ Multiple chuck

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

*  DD  PEARL AND COMPOSITION {4}
7  DF  .~ Surfacing {3}
9.~.~ Multiple chuck

DEFINITION

Classification: 79/9

Machines for turning, grinding, or polishing the face of a button, which are provided with a plurality of chucks for clamping the button-blank.

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