US PATENT SUBCLASS 299 / 28
.~.~.~ Plural blades

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

24  DF  ICE-WORKING DEVICES {1}
25  DF  .~ Relatively moving cutter {2}
27  DF  .~.~ Block-cutting type {1}
28.~.~.~ Plural blades

DEFINITION

Classification: 299/28

(under subclass 27) Apparatus including separate cutting blades.

(1) Note. Separate cutting blades which are integrally connected are included under this definition.