Ladder handrail

Details Ladder handrail Ladder handrail

1989-06-15

1993-05-04

Word, A. Hugo

Building units and construction elements

Stair, ladder, scaffold, or similar support

Element or attachment

Patent

active

D03353540

REFERENCES:
patent: D181617 (1957-12-01), Allison
patent: 1335652 (1920-03-01), Calargo
patent: 2010588 (1935-08-01), Gooden
patent: 2401251 (1946-05-01), Kelsey
patent: 2551345 (1951-05-01), Scott
patent: 2572281 (1951-10-01), Pierce
patent: 2576277 (1951-11-01), Biegen
patent: 2640641 (1953-06-01), Tepper
patent: 2750236 (1956-06-01), Middendorf
patent: 2933149 (1960-04-01), Lee
patent: 4044857 (1977-08-01), Guerette
patent: 4181195 (1980-01-01), Clarke
patent: 4293055 (1981-10-01), Hooser
patent: 4295544 (1981-10-01), Peterson
patent: 4303145 (1981-12-01), Vazquez
patent: 4425984 (1984-01-01), LaChance
patent: 4509617 (1985-04-01), Lapeyre
patent: 4515242 (1985-05-01), LaChance
patent: 4648481 (1987-03-01), Lee

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