US PATENT SUBCLASS 411 / 507
.~.~.~.~ Domed head

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

500  DF  HEADED FASTENER ELEMENT {2}
501  DF  .~ Having plastically flowable or deflectable end, e.g., rivet, etc. {2}
504  DF  .~.~ Solid end type {2}
506  DF  .~.~.~ Bolt head and end flowable {1}
507.~.~.~.~ Domed head

DEFINITION

Classification: 411/507

Domed head:

(under subclass 506) Subject matter wherein the head is in the form of a hemisphere.