US PATENT SUBCLASS 192 / 113.22
.~.~.~ Grooved surfaces

Current as of: June, 1999
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192 /   HD   CLUTCHES AND POWER-STOP CONTROL

*  DD  ELEMENTS {9}
113.1  DF  .~ Lubricating, insulating, or cooling {4}
113.2  DF  .~.~ Air cooling {3}
113.22.~.~.~ Grooved surfaces

DEFINITION

Classification: 192/113.22

Grooved surfaces:

(under subclass 113.2) Structure, wherein engaging clutch surfaces are striated to facilitate the flow of cooling air.