Interfitting ladder

Details Interfitting ladder Interfitting ladder

1982-04-05

1984-11-20

Word, A. Hugo

Building units and construction elements

Stair, ladder, scaffold, or similar support

Stepped

Patent

active

D02764679

REFERENCES:
patent: D258148 (1981-02-01), Loix
patent: 1881902 (1932-10-01), Osterdahl
patent: 3715012 (1973-02-01), Perry
patent: 3762500 (1973-10-01), Sarno

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