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Patent application from Alexander Graham Bell, February 1875

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multiple telegraph patents correspondence alexander graham bell family papers 1834 1974 subject file alexander graham bell family papers at the library of congress american memory alexander graham bell patent application ultra high resolution high resolution manuscripts
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01/01/1875
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Library of Congress
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https://www.loc.gov/
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multiple telegraph patents correspondence alexander graham bell family papers 1834 1974 subject file alexander graham bell family papers at the library of congress american memory alexander graham bell patent application ultra high resolution high resolution manuscripts