LandOfFree - US Patents - Listing for Electrical audio signal processing systems and devices,Electro-acoustic audio transducer,Plural or compound reproducers

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Back to back mounted compound woofer with...

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

Reexamination Certificate

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Bandpass loudspeaker system

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

Utility Patent

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Bass speaker

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

Patent

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Behind-the-head mounted personal audio set

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

Reexamination Certificate

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Bifunctional earphone set

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

Patent

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Bluetooth earphone and lanyard structure thereof

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

Reexamination Certificate

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Body-acoustic device

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

Patent

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Bone conducting headset apparatus

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

Reexamination Certificate

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Bone conduction headset

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

Reexamination Certificate

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Bone-conduction transducer and bone-conduction speaker...

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

Reexamination Certificate

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Boomless hearing/speaking configuration for sound receiving...

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

Reexamination Certificate

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