Step support

Details Step support Step support

1998-04-06

1999-02-09

Clark, Doris

Building units and construction elements

Stair, ladder, scaffold, or similar support

D25 68, 2504

Patent

active

D04055420

REFERENCES:
patent: D14560 (1884-01-01), Reynolds
patent: 4875315 (1989-10-01), Champagne
patent: 5791101 (1998-08-01), Wallace

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