Piping and method of forming the same
United States Patent 1742830

Inventors:
Charles, Seaman
Gerhard, Braf
Publication Date:
01/07/1930
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Assignee:
Seaman
Primary Class:
112/424
Other Classes:
36/57, 112/475.080, 2/274
International Classes:
D05B35/06; D05B29/06; D05B29/00