Statements (14)
Predicate | Object |
---|---|
gptkbp:instanceOf |
telegraph
|
gptkbp:countryOfOrigin |
gptkb:United_States
|
gptkbp:developedBy |
19th century
|
https://www.w3.org/2000/01/rdf-schema#label |
harmonic telegraph
|
gptkbp:inventedBy |
gptkb:Alexander_Graham_Bell
gptkb:Elisha_Gray |
gptkbp:patent |
1870s
|
gptkbp:principle |
uses different frequencies (tones) for each message
|
gptkbp:relatedTo |
gptkb:multiplex_telegraph
gptkb:smartphone |
gptkbp:technology |
gptkb:electrical_telegraph
|
gptkbp:usedFor |
transmitting multiple messages simultaneously over a single wire
|
gptkbp:bfsParent |
gptkb:Elisha_Gray
|
gptkbp:bfsLayer |
4
|