US PATENT SUBCLASS 411 / 68
.~.~.~.~ Tongue and groove

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

15  DF  HAVING SEPARATE EXPANDER MEANS {13}
44  DF  .~ Including sleeve and distinct tapered expander (e.g., anchor bolt type) {9}
63  DF  .~.~ Plural-sectioned sleeve {1}
64  DF  .~.~.~ Having section retainer {3}
68.~.~.~.~ Tongue and groove

DEFINITION

Classification: 411/68

Tongue and groove:

(under subclass 64) Subject matter wherein the retainer means comprises a projection on one section received in a corresponding recess in an adjacent section.