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Patent US219936 - IMPROVEMENT IN COUPLINGS FOR ELECTRIC-ANNUNCIATOR CONDUCTORS
IMPROVEMENT IN COUPLINGS FOR ELECTRIC-ANNUNCIATOR CONDUCTORS
H. MOETON GEEEN
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Patent number
: 219936
Filing date
: Aug 5, 1879
Issue date
: Sep 23, 1879
Inventor
:
H. MOETON GEEEN
Original Assignee
:
F ONE
Current U.S. Classification
:
200/51.1
;
439/819
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