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20 h 44 min, 13 févr. 1837 ans -

Description:

Morse employs Alfred Vail to improve his telegraph from demonstration purposes for a share of future patent rights

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ByWilliam Ward
30 oct. 2018
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Date:

20 h 44 min, 13 févr. 1837 ans
Maintenaint
~ Il y a 187 ans
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