Attachment for oil switches
United States Patent 1620155

Inventors:
Hilliard, John D.
Publication Date:
03/08/1927
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Assignee:
GEN ELECTRIC
Primary Class:
55/512
Other Classes:
55/476
International Classes:
H01H33/57; H01H33/75; H01H33/98; H01H33/02; H01H33/70