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Patent US186427 - IMPROVEMENT IN APPARATUS FOR SIGNALING BY MEANS OF REFLECTED LIGHT
IMPROVEMENT IN APPARATUS FOR SIGNALING BY MEANS OF REFLECTED LIGHT
OPFIC HENEY G. MANGE
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Patent number
: 186427
Filing date
: Feb 25, 1876
Issue date
: Jan 23, 1877
Inventor
:
OPFIC HENEY G. MANGE
Original Assignee
:
P ONE
Current U.S. Classification
:
116/20
View patent at USPTO
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