4. Telephonic communications
  5. Diagnostic testing, malfunction indication, or electrical...
  6. With blocking of normal usage

Robert Kuo-Wei Chen

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Amplifier circuit with regenerative biasing

Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Reexamination Certificate

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Capacitor cancellation method and apparatus

Telephonic communications – Subscriber line or transmission line interface
Reexamination Certificate

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Dual voltage, self-monitoring line circuit

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent

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Self-monitoring line interface circuit

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
Patent

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Tuning filters having transconductor cells

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1396587

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