4. Electrical audio signal processing systems and devices
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Audio system for a computer display

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

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Audio system for a personal computer

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Patent

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Audio system for a personal computer

Electrical audio signal processing systems and devices – Binaural and stereophonic – Hearing aid
Patent

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Audio system for an automobile

Electrical audio signal processing systems and devices – Vehicle
Reexamination Certificate

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Audio system for automotive vehicles

Electrical audio signal processing systems and devices – Vehicle
Patent

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Audio system for improving a signal to noise ratio

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

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Audio system for multipurpose automotive vehicles having a...

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Mounting or support feature of housed loudspeaker
Reexamination Certificate

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Audio system for portable device

Electrical audio signal processing systems and devices – Having non-electrical feature – And loudspeaker
Reexamination Certificate

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Audio system for vehicle

Electrical audio signal processing systems and devices – Vehicle
Patent

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Audio system for vehicular application

Electrical audio signal processing systems and devices – Including frequency control – Having crossover filter
Patent

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Audio system for vehicular application

Electrical audio signal processing systems and devices – Including frequency control – Having crossover filter
Patent

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Audio system for vehicular applications

Electrical audio signal processing systems and devices – Binaural and stereophonic – Center channel
Patent

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Audio system operable in directional and non-directional modes

Electrical audio signal processing systems and devices – Having non-electrical feature – Loudspeakers driven in given phase relationship
Patent

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Audio system utilizing personal computer

Electrical audio signal processing systems and devices – With mixer
Reexamination Certificate

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Audio system with a phase adjustment circuit

Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Reexamination Certificate

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Audio system with amplifier and signal device

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer
Patent

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Audio system with application management system for...

Electrical audio signal processing systems and devices – Vehicle
Reexamination Certificate

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Audio system with feedback detection means

Electrical audio signal processing systems and devices – Feedback suppression
Reexamination Certificate

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Audio system with optional auto-switching secondary...

Electrical audio signal processing systems and devices – Switching
Reexamination Certificate

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Audio system with partitioned input and output compartments

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure
Reexamination Certificate

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