US PATENT SUBCLASS 473 / 580
.~.~.~ Having independent feathers or vanes

Current as of: June, 1999
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473 /   HD   GAMES USING TANGIBLE PROJECTILE

569  DF  PROJECTILE, PER SE; PART THEREOF OR ACCESSORY THEREFOR {28}
578  DF  .~ Arrow, dart, or shuttlecock; part thereof {4}
579  DF  .~.~ Shuttlecock (e.g., badminton shuttlecock, etc.) {1}
580.~.~.~ Having independent feathers or vanes

DEFINITION

Classification: 473/580

Having independent feathers or vanes:

(under subclass 579) Subject matter wherein the aerodynamic tail portion of the missile either (a) is composed of a plurality of discrete feathers or vane members usually connected together at or by the head end portion of the missile, or (b) is composed of a unitary (often sheetlike) member which is connected to the head end portion of the missile and slit, splayed, formed, etc. in such a manner that a plurality of discrete vane members are produced.

(1) Note. The assembly of discrete feathers or vane members may also be encircled or at least partially connected together by a cord, thread, disc, etc., in the region of the tail portion that extends from the aerodynamic-acting part (i.e., the actual feathered or vaned part) to the head end portion. For example, the quill portions an assembly of discrete feathers are often encircled by a cord or thread at a region just below the feathered portions so as to preserve the classical truncated cone-shape of a feathered-tail type of shuttlecock.