Adjustable ladder

Details Adjustable ladder Adjustable ladder

1999-07-15

2000-04-25

Clark, Doris

Building units and construction elements

Stair, ladder, scaffold, or similar support

Stepped

2504

Patent

active

D04236858

REFERENCES:
patent: D238298 (1975-12-01), Larson
patent: 3948353 (1976-04-01), Lane

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