US PATENT SUBCLASS 52 / 113
.~ With spring-actuated return

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

111  DF  MECHANISM OPERATED RELATIVELY MOVABLE SHAFT ASSEMBLY {6}
113.~ With spring-actuated return

DEFINITION

Classification: 52/113

(under subclass 111) Structure wherein spring means are provided to return the rigid elongated member or construction to an upright position after deflection by a transversely applied outside force.