US PATENT SUBCLASS 144 / 278.3
.~ Vacuum operated

Current as of: June, 1999
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144 /   HD   WOODWORKING

278.1  DF  MACHINE WORK CLAMP {2}
278.3.~ Vacuum operated

DEFINITION

Classification: 144/278.3

Vacuum operated:

(under subclass 273.1) Work clamp including means utilizing negative atmospheric pressure to cause the clamp to grip the workpiece.