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the Harmonic Telegraph: Forgotten Submarine Telephone: Elisha Gray, Acoustic Frequencies, and Bitter Patent War That Birthed Global Telecommunications

Name: the Harmonic Telegraph: Forgotten Submarine Telephone: Elisha Gray, Acoustic Frequencies, and Bitter Patent War That Birthed Global Telecommunications
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SKU: 4728238f0d2f1753e58267b5d53e5822

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the Harmonic Telegraph: Forgotten Submarine Telephone: Elisha Gray, Acoustic Frequencies, and Bitter Patent War That Birthed Global Telecommunications