4. Acoustics
  5. Diaphragm
  6. With damping means

Koji Takayama

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Electret microphone

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

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Electret microphone

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

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Electrically conductive damper device for speaker

Acoustics – Diaphragm – With damping means
Reexamination Certificate

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Speaker device

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
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Speaker diaphragm

Acoustics – Diaphragm – Critically defined material or coating
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2759602

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