US PATENT SUBCLASS 411 / 406
.~.~.~ Dovetail

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

378  DF  EXTERNALLY THREADED FASTENER ELEMENT, E.G., BOLT, SCREW, ETC. {16}
402  DF  .~ Head driving structure {4}
403  DF  .~.~ Socket or slot {4}
406.~.~.~ Dovetail

DEFINITION

Classification: 411/406

Dovetail:

(under subclass 403) Subject matter wherein the cavity or groove is in the form of a fan-shaped mortise adapted to interlock with a mating tenon tool.

(1) Note. The tenon tool end interlocks with the bolt head by sliding transversely to the fastener axis into the mortise.