demonstrated to

URI: https://gptkb.org/prop/demonstrated_to
4 triples
GPTKB property
Random triples
Subject Object
gptkb:Bell's_electric_sound_transmitter gptkb:Thomas_Watson
gptkb:Edison's_phonograph the public
gptkb:Bell's_electric_sound_receiver gptkb:Thomas_Watson
gptkb:Bell's_electric_voice_machine gptkb:Thomas_Watson