4. Electrical audio signal processing systems and devices
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Audio speaker system for personal computer

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

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Audio speaker utilizing an unanchored magnet for primary...

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

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Audio speaker utilizing an unanchored magnet for primary...

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

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Audio speaker utilizing an unanchored magnet for primary...

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

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Audio speaker with graduated voice coil windings

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

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Audio speaker with harmonic enclosure

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

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Audio speaker with partially spherical speaker housing and...

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

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Audio spectrum analyzer operable in a difference mode

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

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Audio subband encoded signal decoder

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent

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Audio superpositioning

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

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Audio surround system with stereo enhancement and directivity se

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

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Audio surveillance discouragement apparatus and method

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

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Audio switch device with timed insertion of substitute signal

Electrical audio signal processing systems and devices – With mixer
Patent

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Audio system

Electrical audio signal processing systems and devices – Sound effects
Reexamination Certificate

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Audio system

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

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Audio system

Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Loudspeaker operation
Reexamination Certificate

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Audio system

Electrical audio signal processing systems and devices – Vehicle
Reexamination Certificate

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Audio system

Electrical audio signal processing systems and devices – Sound effects
Reexamination Certificate

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Audio system

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

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Audio system

Electrical audio signal processing systems and devices – Monitoring of sound – Amplification control responsive to ambient sound
Patent

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