Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1990-03-19
1993-01-19
Word, A. Hugo
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
Patent
active
D03326675
REFERENCES:
patent: D272857 (1984-02-01), Leach
patent: 3313376 (1967-04-01), Holland, Sr.
patent: 3414311 (1968-12-01), Trimboli
patent: 4219142 (1980-08-01), MacPherson
patent: 4483416 (1984-11-01), Garcia
patent: 4492286 (1985-01-01), Lemire
patent: 4924971 (1990-05-01), Rice
Clark Doris
Gernstein Terry M.
Word A. Hugo
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