Building units and construction elements – Stair – ladder – scaffold – or similar support – Sawhorse
Patent
1990-03-01
1991-12-03
Word, A. Hugo
Building units and construction elements
Stair, ladder, scaffold, or similar support
Sawhorse
Patent
active
D03221334
REFERENCES:
patent: D213254 (1969-01-01), Hollingsworth
patent: 304207 (1884-08-01), Langlais
patent: 4278148 (1981-07-01), Daley et al.
Corneau Christopher C.
Wasolek John J.
Clark Doris
Gossett Dykema
Word A. Hugo
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