1861: Reis demonstrates the Telephon
1865: Dolbear invents early telephone receiver
1871: Meucci files caveat for voice communication device
1876: Alexander Graham Bell patents the telephone
1876: Elisha Gray files telephone caveat
1876: First intelligible telephone call
First telephone line
1877: Thomas Edison patents the carbon button transmitter
1877: Tivadar Puskás invents the telephone exchange
1877: Watson invents the telephone ringer
1878: Blake transmitter patented