30
/fr/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
June 15, 2024
195030
61723
2
Public Timelines FAQ
Public TimelinesFAQ
Public TimelinesFAQ
For educational institutions For teachers For students Open cabinet
For educational institutions For teachers For students Open cabinet
Créer
Create a timeline
Public timelines
Library
FAQ

Process of Making The Harmonic Telegraph & a Voice Transmitting Device (1 janv. 1873 – 31 déc. 1875)

Description:

Bell & Watson worked on both the harmonic telegraph & a voice transmitting device from about 1873 to 1875

Ajouté au bande de temps:

Bell Telephone Invention

ByQueen Geli
13 févr. 2018
1
0
433

Date:

1 janv. 1873
31 déc. 1875
~ 2 years and 11 months
About & FeedbackUn accordConfidentialitéBibliothèque
2024 © Time.Graphics
Support 24/7  
CabinetGet premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL
Excellent (Trustpilot Reviews)
Based on 115+ reviews