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

Nils Erik Vilhelm Martensson

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Cordless telephone arrangement

Telecommunications – Radiotelephone system – Including private cordless extension system
Reexamination Certificate

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Portable radio telephone with impulse movement or sound off-hook

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

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Portable radio telephone with sound off-hook production

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

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Profile ID: LFUS-PAI-P-382930

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