4. Electrical audio signal processing systems and devices
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Water-resistant device for protecting an electronic sound produc

Electrical audio signal processing systems and devices – Noise or distortion suppression – Interpolation
Patent

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Watermarking of digital images using wavelet and discrete...

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

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Waterproof acoustic structure applicable in conjunction with...

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

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Waterproof cover for housing in hospital bed containing...

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

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Waterproof microphone

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

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Waterproof microphone

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

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Waterproof microphone and speaker

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker
Patent

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Waterproof speaker for use in an automobile

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

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Waterproof type microphone

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

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Waterproof vibration plate for speaker

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

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Wave dependent compressor

Electrical audio signal processing systems and devices – Including amplitude or volume control – With amplitude compression/expansion
Patent

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Wave signal processing system and method

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

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Wave signal processing system and method

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

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Wave-filtering device with an adjustable frequency bandwidth

Electrical audio signal processing systems and devices – Noise or distortion suppression – Spectral adjustment
Reexamination Certificate

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Wave-filtering device with an adjustable frequency bandwidth

Electrical audio signal processing systems and devices – Noise or distortion suppression – Spectral adjustment
Reexamination Certificate

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Waved/corrugated and stepped surface design for speaker box,...

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

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Waved/corrugated and stepped surface design for speaker box,...

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

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Waveform playback device for active noise cancellation

Electrical audio signal processing systems and devices – Sound or noise masking
Reexamination Certificate

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Waveguide electroacoustical transducing

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

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Waveguide electroacoustical transducing

Electrical audio signal processing systems and devices – Vehicle
Patent

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