Corrugated sheet-metal casing
United States Patent 1568727

Inventors:
Frank, John J.
Publication Date:
01/05/1926
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Assignee:
GEN ELECTRIC
Primary Class:
165/104.330
Other Classes:
174/16.100, 336/58, 174/15.100
International Classes:
H01F27/12; H01F27/10