Statements (14)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:telegraph
|
| gptkbp:countryOfOrigin |
gptkb:United_States
|
| gptkbp:developedBy |
gptkb:19th_century
|
| 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
|
| https://www.w3.org/2000/01/rdf-schema#label |
harmonic telegraph
|