Building units and construction elements – Stair – ladder – scaffold – or similar support – Sawhorse
Patent
1998-02-26
2000-10-24
Clark, Doris
Building units and construction elements
Stair, ladder, scaffold, or similar support
Sawhorse
2504
Patent
active
D04326709
REFERENCES:
patent: D308728 (1990-06-01), Carlson
patent: 4403678 (1983-09-01), Zieg
patent: 4433753 (1984-02-01), Watson
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