Building units and construction elements – Stair – ladder – scaffold – or similar support – Sawhorse
Patent
1997-07-08
1998-10-20
Clark, Doris
Building units and construction elements
Stair, ladder, scaffold, or similar support
Sawhorse
2504
Patent
active
D03999777
REFERENCES:
patent: D257395 (1980-10-01), Correll
patent: D300861 (1989-04-01), Correll et al.
patent: 2602008 (1952-07-01), Hasselbring
patent: 4711319 (1987-12-01), Sansotta et al.
American Manufacturing Company, Inc.
Clark Doris
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