Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Telecommunication system
|
| gptkbp:canBe |
full-duplex
half-duplex |
| gptkbp:component |
gptkb:public_speaker
gptkb:television_channel audio recordings receiver Antenna |
| gptkbp:developedBy |
20th century
|
| gptkbp:enables |
voice communication
|
| https://www.w3.org/2000/01/rdf-schema#label |
Radio telephone system
|
| gptkbp:predecessor |
cellular telephone system
|
| gptkbp:relatedTo |
walkie-talkie
mobile radio |
| gptkbp:usedIn |
gptkb:military
aviation public safety amateur radio maritime communication taxi dispatch |
| gptkbp:uses |
gptkb:radio_waves
|
| gptkbp:bfsParent |
gptkb:US_Patent_3774914
|
| gptkbp:bfsLayer |
5
|