Train signal lamp
United States Patent 1695258

Inventors:
Spear, Furman D.
Publication Date:
12/11/1928
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Assignee:
ARMSPEAR MFG COMPANY
Primary Class:
362/284
Other Classes:
362/310, 362/308, 246/473.300, 362/293, 362/336
International Classes:
B61L5/18; B61L15/02; F21S8/10; B61L5/00; B61L15/00