4. Electrical audio signal processing systems and devices
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Audio speaker damper with electrically conductive paths...

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

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Audio speaker for use in an external magnetic field

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

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Audio speaker having a removable voice coil

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

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Audio speaker having a removable voice coil

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

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Audio speaker having rotatable tweeter

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

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Audio speaker mounts for off-road vehicles

Electrical audio signal processing systems and devices – Vehicle
Patent

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Audio speaker system

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

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Audio speaker system

Electrical audio signal processing systems and devices – Loudspeaker feedback
Patent

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Audio speaker system employing an axi-symmetrical horn with...

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

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Audio speaker system for automotive vehicle

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

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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
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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
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