4. Electrical audio signal processing systems and devices
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Directional microphone assembly

Electrical audio signal processing systems and devices – Hearing aids – electrical – Directional
Reexamination Certificate

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Directional microphone assembly

Electrical audio signal processing systems and devices – Hearing aids – electrical – Directional
Reexamination Certificate

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Directional microphone assembly

Electrical audio signal processing systems and devices – Hearing aids – electrical – Directional
Reexamination Certificate

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Directional microphone assembly

Electrical audio signal processing systems and devices – Hearing aids – electrical – Directional
Patent

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Directional microphone assembly for mounting behind a surface

Electrical audio signal processing systems and devices – Vehicle
Reexamination Certificate

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Directional microphone for computer visual display monitor and m

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

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Directional microphone for computer visual display monitor and m

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

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Directional microphone system

Electrical audio signal processing systems and devices – Directive circuits for microphones
Patent

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Directional microphone system

Electrical audio signal processing systems and devices – Sound effects – Reverberators
Patent

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Directional microphone system

Electrical audio signal processing systems and devices – Directive circuits for microphones
Patent

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Directional microphone system

Electrical audio signal processing systems and devices – Directive circuits for microphones
Patent

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Directional microphone system

Electrical audio signal processing systems and devices – Hearing aids – electrical – Directional
Reexamination Certificate

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Directional microphone system

Electrical audio signal processing systems and devices – Directive circuits for microphones
Patent

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Directional microphone system providing for ease of assembly and

Electrical audio signal processing systems and devices – Hearing aids – electrical – Directional
Patent

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Directional microphone utilizing spaced apart...

Electrical audio signal processing systems and devices – Directive circuits for microphones
Reexamination Certificate

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Directional microphone with acoustic washer

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

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Directional microphone, in particular having symmetrical...

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Housed microphone
Reexamination Certificate

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Directional silicon condenser microphone having additional...

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Reexamination Certificate

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Directional sound acquisition

Electrical audio signal processing systems and devices – Directive circuits for microphones
Reexamination Certificate

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Directional sound wave radiator

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

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