Title:
Valved spark plug
Document Type and Number:
United States Patent 1685017
Inventors:
Bowman, John G.
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Publication Date:
09/18/1928
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Referenced by:
Export Citation:
Assignee:
William, Haseltine C.
Primary Class:
Other Classes:
313/120, 137/516.110, 137/538
International Classes:
H01T13/40; H01T13/00