4. Telephonic communications
  5. Subscriber line or transmission line interface
  6. Protective circuit

William M. Parrott

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Apparatus and method for remotely powering-down a wireless...

Telecommunications – Receiver or analog modulated signal frequency converter – With particular receiver circuit
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Secure transaction modem storing unique indicia

Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate

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System and method for protecting devices connected to a...

Telephonic communications – Subscriber line or transmission line interface – Protective circuit
Reexamination Certificate

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System and method for protecting devices connected to a...

Telephonic communications – Subscriber line or transmission line interface – Protective circuit
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2520956

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