4. Multiplex communications
  5. Wide area network
  6. Packet switching

Alfred Grau

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Apparatus and method for transmitting messages between a plurali

Multiplex communications – Wide area network – Packet switching
Patent

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Arrangement for compensation of unwanted echoes caused by the mo

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent

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Switching arrangement for activating electrical devices

Telephonic communications – Multi-line or key substation system with selective switching... – Switching or supervision feature
Patent

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Profile ID: LFUS-PAI-P-772278

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