Building units and construction elements – Stair – ladder – scaffold – or similar support – Sawhorse
Patent
1989-07-10
1990-06-19
Word, A. Hugo
Building units and construction elements
Stair, ladder, scaffold, or similar support
Sawhorse
Patent
active
D03087280
REFERENCES:
patent: 1486395 (1924-03-01), Smithers
patent: 2505532 (1950-04-01), Ernst
patent: 3848700 (1974-11-01), Davis, Jr.
patent: 3858682 (1975-01-01), Larson
patent: 4429765 (1984-02-01), Garcia
patent: 4515243 (1985-05-01), Prior
Clark Doris
Kearns Jerry T.
Word A. Hugo
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