US PATENT SUBCLASS 16 / 2.4
.~.~ Threaded

Current as of: June, 1999
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16 /   HD   MISCELLANEOUS HARDWARE

2.1  DF  BUSHING {3}
2.3  DF  .~ Bung or tap {1}
2.4.~.~ Threaded

DEFINITION

Classification: 16/2.4

Threaded:

(under subclass 2.3) Bushing ... including a helical cooperating portion in the interior adapted to threadingly engage a cooperating helical portion on the exterior of the bung or tap to secure the bushing in place.