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When was the first analog device, the phonautograph, launched? The phonautograph was the first analog device; it launched in _____ .
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When was the first analog device, the phonautograph, launched?

The phonautograph was the first analog device; it launched in _____
.

User Ani Alaverdyan
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Answer:

1860

Step-by-step explanation:

User Chandra Mohan
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