Building units and construction elements – Stair – ladder – scaffold – or similar support – Sawhorse
Patent
1988-01-28
1991-02-19
Word, A. Hugo
Building units and construction elements
Stair, ladder, scaffold, or similar support
Sawhorse
Patent
active
D03148289
REFERENCES:
patent: D245105 (1977-07-01), Rader
patent: 1122158 (1914-12-01), Reach
patent: 1462707 (1923-07-01), Lawlor
patent: 2633221 (1953-03-01), Roeder
patent: 4008892 (1977-02-01), Nissen
Medart Catalog of Gymnasium Apparatus, .COPYRGT.1914, p. 86, Adjustable Hurdles top center of pg.
Clark Doris
Word A. Hugo
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