US PATENT SUBCLASS 220 / 818
.~.~.~ Multiple plane swing

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
810  DD  .~ Pivotable, (e.g., hinged) {13}
817  DD  .~.~ About multiple axes {2}
818.~.~.~ Multiple plane swing