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Patent US166096 - IMPROVEMENT IN ELECTRIC TELEGRAPHS FOR TRANSMITTING MUSICAL, TONES
IMPROVEMENT IN ELECTRIC TELEGRAPHS FOR TRANSMITTING MUSICAL, TONES
ELISHA GRAY
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Patent number
: 166096
Issue date
: Jul 27, 1875
Inventor
:
ELISHA GRAY
Original Assignee
:
F OASTE
Current U.S. Classification
:
178/47
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