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1 Jan 1888 Jahr - Battery Systems

Beschreibung:

Common battery system developed by Hammond V. Hayes, allows one central battery to power all telephones on an exchange, rather than relying on each unit's own battery.

Zugefügt zum Band der Zeit:

History of Phones

ByOsasere Guobadia
24 Okt 2018

Datum:

1 Jan 1888 Jahr
Jetzt
~ 136 years ago

Abbildungen:

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