Fire ladder rung

Details Fire ladder rung Fire ladder rung

1978-01-16

1980-04-01

Gandy, James M.

Building units and construction elements

Stair, ladder, scaffold, or similar support

Element or attachment

D0699

Patent

active

D02546302

REFERENCES:
patent: 1779370 (1930-10-01), Pfeil
patent: 2518839 (1950-08-01), Thonney
patent: 4143741 (1979-03-01), Souza et al.

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