Grating
United States Patent 2960918
US Patent References:
/0865180.html
- - 0865180

Grating
- - 1603678

Grating
- - 1665846

Construction of roads and the like
- - 1784895

Nonslip wear-resistant tread
- - 2246898


Inventors:
Harold, Nagin
Publication Date:
11/22/1960
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Assignee:
Reliance, Steel Products Compan
Primary Class:
52/181
Other Classes:
404/19, 52/669, 52/309.140, D05/1, D25/154
International Classes:
E01D19/12
Foreign References:
FR519055A
FR851219A
DE811033C