US PATENT SUBCLASS 384 / 96
.~.~ Roller cone retaining means
Current as of:
June, 1999
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384 /
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BEARINGS
91
DF
ROTARY BEARING
{8}
92
DF
.~ Roller drill bit {4}
96
.~.~ Roller cone retaining means
DEFINITION
Classification: 384/96
Roller cone retaining means:
(under subclass 92) Subject matter including means to hold a roller cone on its supporting shaft.