Stair construction
United States Patent 2936863
US Patent References:
/0833746.html
- - 0833746

Metallic-stair construction
- - 1701659


Inventors:
Holzer, Frederick L.
Publication Date:
05/17/1960
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Assignee:
Holzer, Frederick L.
Primary Class:
52/191
Other Classes:
D25/63
International Classes:
E04F11/025; E04F11/02
Foreign References:
GB424200A