US PATENT SUBCLASS 411 / 407
.~.~.~ Having driver retaining means

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}
407.~.~.~ Having driver retaining means

DEFINITION

Classification: 411/407

Having driver retaining means:

(under subclass 403) Subject matter wherein the cavity or groove includes means for preventing inadvertent longitudinal movement of the tool.

SEE OR SEARCH CLASS

81, Tools,

459, for wrenches provided with driver retaining means in the form of a threaded periphery.