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| ritorna Bell |
| Cenni biografici |
| Bibliografia |
Alexander Graham Bell |
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Edinbourg
(Scotlkand)
3.3.1847- Beinn
Bhreagh, Cape
Breton Island-Nuova Scozia 2.8.1922)
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DOCUMENTI:
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| 1875 | |||
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| 1879 |
16 01 1879 US213090 ELECTRIC SPEAKING-TELEPHONES
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| 1879 |
16 01 1879 US213090 ELECTRIC SPEAKING-TELEPHONES (2)
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| 1879 |
17 07 1879 US220791 TELEPHONE-CIRCUITS
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| 1879 |
17 07 1879 US220791 TELEPHONE-CIRCUITS (2)
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| 1899 | |||