4. Telephonic communications
  5. Having light wave or ultrasonic link for speech or paging...
  6. Including fiber optic link within telephone network

Toivo Vilmi

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Amplifier control system

Telecommunications – Transmitter and receiver at same station – Transceiver controlling a separate transceiver or receiver
Patent

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Dual mode transmission system with switched linear amplifier

Telecommunications – Transmitter – With feedback of modulated output signal
Patent

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Hands free equipment

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent

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Hands free equipment

Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent

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Profile ID: LFUS-PAI-P-299202

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