The Battle Over Net Neutrality Started With the 1920s-Era ‘Hush-A-Phone’

How an early telephone silencer took on AT&T.

It’s not unusual today to overhear strangers’ intimate phone conversations while commuting to work on public transit, or when relaxing in a park.¬†Wireless telephone devices also give us the luxury of seeking out a quiet space where no one can listen in on a private phone call, or taking calls on the move.

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