Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1993-12-22
1995-03-07
Burke, Wallace R.
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
D 8349
Patent
active
D03561666
REFERENCES:
patent: 4363378 (1982-12-01), Williams et al.
patent: 4643275 (1987-02-01), LeBlanc
Baynham H.
Burke Wallace R.
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