4. Telecommunications
  5. Radiotelephone system
  6. Security or fraud prevention

Motoshi Sumioka

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Communication method, communication system, key management...

Telecommunications – Radiotelephone system – Security or fraud prevention
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Relay apparatus, relay method, and relay program

Multiplex communications – Pathfinding or routing
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Profile ID: LFUS-PAI-P-2194002

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