Patent model, Johnson telephone transmitter, US Patent #341,579

Patent model, Johnson telephone transmitter, US Patent #341,579

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Location
Currently not on view
Object Name
Telephone Transmitter
Other Terms
Telephone Transmitter; Telephones; Transmitter
Date made
1886
maker
Johnson, E. H.
Measurements
overall: 3 1/8 in x 3 in x 3 3/8 in; 7.9375 cm x 7.62 cm x 8.5725 cm
ID Number
EM.308625
catalog number
308625
accession number
89797
patent number
341579
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Work and Industry: Electricity
Data Source
National Museum of American History
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