Related terms:
reis
meucci
caveat
wilber
bell
elisha gray
patent
telegraphy
telephony
diaphragm
patent caveat
telegraph
sound waves
alexander bell
invention
patent office
antonio meucci
telephone
transmitting
transmitter
water transmitter
innocenzo manzetti
variable resistance
public demonstrations
telephone exchange
alexander graham bell
Wikipedia sources:
Elisha Gray
Telephone
Invention of the telephone
Alexander Graham Bell
Context for words:
liquid
transmitter
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