4. Acoustics
  5. Diaphragm
  6. Critically defined material or coating

Ryoichi Kawasaki

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Diaphragm for speaker

Acoustics – Diaphragm – Critically defined material or coating
Patent

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Diaphragm for speaker

Acoustics – Diaphragm – Critically defined material or coating
Patent

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Electric mechanical transducer and optical type pickup apparatus

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent

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Laser attachment device and optical pick-up device using the...

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate

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Lens driving apparatus and optical pickup unit having the same

Optical: systems and elements – Lens – With viewed object or viewed field illumination
Reexamination Certificate

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Profile ID: LFUS-PAI-P-482834

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