4. Acoustics
  5. Diaphragm
  6. Critically defined material or coating
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Electro-acoustic transducer with high air permeable diaphragm

Acoustics – Diaphragm – Critically defined material or coating
Patent

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Electroacoustic diaphragm and method for making same

Acoustics – Diaphragm – Critically defined material or coating
Patent

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Electroacoustic transducer frame and method of making the same

Acoustics – Diaphragm – Critically defined material or coating
Reexamination Certificate

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