4. Telecommunications
  5. Radiotelephone system
  6. Message storage or retrieval

Werner Hein

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Circuit and method for recording and playing back voice and...

Telecommunications – Radiotelephone system – Message storage or retrieval
Reexamination Certificate

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Data transmission device with a data transmission channel...

Electrical computers and digital data processing systems: input/ – Intrasystem connection
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Receiver

Pulse or digital communications – Receivers
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Profile ID: LFUS-PAI-P-2623526

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