Building units and construction elements – Stair – ladder – scaffold – or similar support – Stepped
Patent
1977-03-24
1981-02-03
Gandy, James M.
Building units and construction elements
Stair, ladder, scaffold, or similar support
Stepped
D0699
Patent
active
D02581485
REFERENCES:
patent: D238298 (1975-12-01), Larson
patent: 3454135 (1969-07-01), Redman et al.
patent: 3498410 (1970-03-01), Storch
patent: 3516515 (1970-06-01), Clash
patent: 3902569 (1975-09-01), Bair
patent: 3935926 (1976-02-01), Butler
Burns Robert E.
Gandy James M.
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