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
- See more items in
- Work and Industry: Electricity
- Data Source
- National Museum of American History
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