Making bonded felt
United States Patent 2881505

Inventors:
Hoffman, Manfred T.
Publication Date:
04/14/1959
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Assignee:
Hoffman, Manfred T.
Primary Class:
264/119
Other Classes:
8/DIG.004, 8/130.100, 28/112, 28/134
International Classes:
D04H1/48
US Patent References:
2723935Sheet material
Foreign References:
GB458802A