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Thomas Edison papers
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/thomasedisonpap00moul
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Letter
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https://library.si.edu/digital-library/book/letter00blak
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A true mirror of sound
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/truemirrorsound00bett
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[Graphophone patents] v. 2
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten02unit
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[Graphophone patents] v. 4
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten04unit
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[Graphophone patents] v. 6
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten06unit
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[Graphophone patents] v. 8
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten08unit
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[Graphophone patents] v. 11
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten11unit
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[Graphophone patents] v. 13
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten13unit
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[Graphophone patents] v. 15
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten15unit
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[Graphophone patents] v. 17
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten17unit
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[Graphophone patents] v. 19
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten19unit
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[Graphophone patents] v. 20
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten20unit
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[Graphophone patents] v. 5
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten05unit
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[Graphophone patents] v. 7
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten07unit
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[Graphophone patents] v. 9
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten09unit
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[Graphophone patents] v. 10
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten10unit
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[Graphophone patents] v. 12
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten12unit
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[Graphophone patents] v. 14
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten14unit
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[Graphophone patents] v. 16
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/graphophonepaten16unit