(under subclass 706) Pin* wherein the penetrating portion is constructed from an elongated filament which either (a) has a particular structural modification (e.g., stepped point) or (b) is made from a particular material.
SEE OR SEARCH CLASS
411, Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener,
487+, for a nail, tack, or staple having specific shank or penetrating end structure.