US PATENT SUBCLASS 220 / 920
.~ Shock absorbing spacing element (e.g., spring)

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220 /   HD   RECEPTACLES

918  DF  SPACING ELEMENT FOR SEPARATING THE WALLS OF A SPACED-WALL CONTAINER {3}
920.~ Shock absorbing spacing element (e.g., spring)

DEFINITION

Classification: 220/920

Shock absorbing spacing element (e.g., spring):

(under subclass 918) Subject matter wherein the spacing element will at least partially absorb a force applied to the container.