4. Telephonic communications
  5. Subscriber line or transmission line interface

Michael J. Gambuzza

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Data access arrangement for a digital subscriber line

Pulse or digital communications – Cable systems and components – Transformer coupling
Reexamination Certificate

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Isolation amplifier with hook switch control

Telephonic communications – Subscriber line or transmission line interface
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RF coupled data access arrangement circuit for telephony...

Telecommunications – Transmitter and receiver at separate stations – Short range rf communication
Reexamination Certificate

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Wavelength-modulation spectroscopy method and apparatus

Optics: measuring and testing – For light transmission or absorption – By comparison
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2005911

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