US PATENT SUBCLASS 220 / 838
.~.~.~.~ Particular biasing structure

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
810  DD  .~ Pivotable, (e.g., hinged) {13}
836  DD  .~.~ Hinge members formed integrally with closure and closure support {5}
837  DD  .~.~.~ Flexible hinge {2}
838.~.~.~.~ Particular biasing structure