Edison speaking telephone, US Patent #203,015

Edison speaking telephone, US Patent #203,015

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Location
Currently not on view
Object Name
Telephone
experimental telephone
Other Terms
Telephone; Telephones
Date made
1878
maker
Edison, Thomas Alva
Measurements
overall: 3 1/4 in x 3 in x 5 in; 8.255 cm x 7.62 cm x 12.7 cm
ID Number
EM.252620
catalog number
252620
accession number
49064
patent number
203015
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Work and Industry: Electricity
Data Source
National Museum of American History
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