Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1993-12-16
1995-06-13
Clark, Doris
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
Patent
active
D03593657
REFERENCES:
patent: D341664 (1993-11-01), Newkirk
patent: 1592499 (1926-07-01), Padgett
patent: 3394774 (1968-07-01), Lanier
patent: 3554321 (1971-01-01), Stedman
patent: 4249638 (1981-02-01), Fernandez
patent: 4683980 (1987-08-01), Vayko
patent: 4683982 (1987-08-01), Baker
Greene Charles L.
Greene Leeta G.
Clark Doris
Gernstein Terry M.
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