4. Electrical audio signal processing systems and devices
  5. Including frequency control
  6. Automatic tone control

Masahiro Umewaka

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FSK signal demodulation circuit

Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate

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FSK signal demodulation circuit

Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate

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Hysteresis comparator and reset signal generator

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Particular stable state circuit
Reexamination Certificate

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Tone control device and sound volume/tone control device for red

Electrical audio signal processing systems and devices – Including frequency control – Automatic tone control
Patent

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Tuning circuit having amplitude-varying function

Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate

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Profile ID: LFUS-PAI-P-818525

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