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

Doug M. Berger

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Efficient and flexible communication device and system with...

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

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Method and system which uses sound wave based communication...

Telecommunications – Radiotelephone system – Security or fraud prevention
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2592997

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