4. Electrical audio signal processing systems and devices
  5. Acoustical noise or sound cancellation
  6. Counterwave generation control path

Stefan Gierl

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Antenna and frequency diversity receiving apparatus

Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
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Apparatus and method for demodulating a radio data system...

Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Reexamination Certificate

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Apparatus and method for multichannel sound reproduction system

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Reexamination Certificate

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Method for supressing surrounding noise in a hands-free...

Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Counterwave generation control path
Reexamination Certificate

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Method for supressing surrounding noise in a hands-free...

Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Counterwave generation control path
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2385824

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