Building units and construction elements – Stair – ladder – scaffold – or similar support – Sawhorse
Patent
1994-02-03
1995-08-01
Clark, Doris
Building units and construction elements
Stair, ladder, scaffold, or similar support
Sawhorse
Patent
active
D03609537
REFERENCES:
patent: 1224893 (1917-05-01), Bekwith
patent: 2633221 (1953-03-01), Roeder
patent: 4252304 (1981-02-01), Pettican
patent: 4492354 (1985-01-01), Rice
patent: 4727960 (1988-03-01), Chaffel et al.
American Manufacturing Company, Inc.
Clark Doris
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