4. Electrical audio signal processing systems and devices
  5. Sound effects
  6. Reverberators

Forester W. Isen

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3-Way call detection system and method

Telephonic communications – Call or terminal access alarm or control – Fraud or improper use mitigating or indication
Reexamination Certificate

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3D woofer drive circuit

Electrical audio signal processing systems and devices – Binaural and stereophonic – Center channel
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4-Channel surround sound generator

Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Patent

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5-2-5 matrix system

Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Patent

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5-2-5 Matrix system

Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Reexamination Certificate

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Profile ID: LFUS-PAI-P-34863

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