Title:
Warning signal
United States Patent 1828892

Inventors:
Felton, William T.
Publication Date:
10/27/1931
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Assignee:
Felton, William T.
Primary Class:
116/173
Other Classes:
473/176, 52/113, D11/166, 403/229, 248/519, 404/9, 248/160, 40/439, 40/608
International Classes:
E01F9/011; E01F9/017