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The top documents tagged [telephone patent]
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telephone patent
telecommunication sector
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A telephone is an instrument that sends and receives information, usually by means of electricity. The word telephone comes from Greek words meaning far.
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Bell Labs: Research, Development, and Innovation in a Monopoly Sheldon Hochheiser, 73 Archivist and Institutional Historian, IEEE Former Corporate Historian.
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57291144 47409641-airtel
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Passive voic euapt
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L08 Disruptive Technology
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