US PATENT SUBCLASS 220 / 833
.~.~ Including integrally formed structure to retain closure in closed position


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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
810  DD  .~ Pivotable, (e.g., hinged) {13}
833.~.~ Including integrally formed structure to retain closure in closed position {1}
834  DD  .~.~.~> Closure situated by resilient distortion and retained by preformed configuration (e.g., detent) {1}