US PATENT SUBCLASS 299 / 1.7
.~.~.~ Of advancing material handling means or roof support

Current as of: June, 1999
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299 /   HD   MINING OR IN SITU DISINTEGRATION OF HARD MATERIAL

1.05  DF  AUTOMATIC CONTROL; SIGNALING OR INDICATING {4}
1.4  DF  .~ Of hard material disintegrating machines {3}
1.6  DF  .~.~ Sidewall working {1}
1.7.~.~.~ Of advancing material handling means or roof support

DEFINITION

Classification: 299/1.7

Of advancing material handling means or roof support:

(under subclass 1.6) Process or apparatus where a conveying means or an upper wall supporting means are moved with the cutter.