Grating mats for floors
United States Patent 2784464

Inventors:
Wilhelm, Larsvall Sten
Publication Date:
03/12/1957
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Assignee:
Wilhelm, Larsvall Sten
Primary Class:
160/231.200
Other Classes:
52/669, 15/239, 52/667
International Classes:
A47L23/24; E04F15/00; A47L23/00