Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1983-08-01
1986-07-01
Word, A. Hugo
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
Patent
active
D02845130
REFERENCES:
patent: D273996 (1984-05-01), Rasler
patent: 3020972 (1962-02-01), Hockett
patent: 3294197 (1966-12-01), Kwiatkowski
patent: 4445659 (1984-05-01), LaChance
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