US PATENT SUBCLASS 411 / 380
.~.~ Having spherical head

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}
379  DF  .~ Stay bolt {2}
380.~.~ Having spherical head {1}
381  DF  .~.~.~> And telltale bore

DEFINITION

Classification: 411/380

Having spherical head:

(under subclass 379) Subject matter wherein one end is shaped in the form of a globe.