Ladder

Details Ladder Ladder

1992-05-19

1994-05-17

Word, A. Hugo

Building units and construction elements

Stair, ladder, scaffold, or similar support

Stepped

Patent

active

D03470695

REFERENCES:
patent: D203173 (1965-12-01), Chubbs
patent: 1909620 (1933-05-01), Lang
patent: 2143783 (1939-01-01), Liebman
patent: 4060150 (1977-11-01), Hughes
patent: 4463829 (1984-08-01), Cori

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