4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Electrostrictive, magnetostrictive, or piezoelectric

Fumihisa Ito

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Flat display apparatus with speaker function

Liquid crystal cells – elements and systems – Particular structure – Holder – support – frame – or housing
Reexamination Certificate

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Piezoelectric acoustic device

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electrostrictive – magnetostrictive – or piezoelectric
Patent

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Piezoelectric element and piezoelectric acoustic device

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electrostrictive – magnetostrictive – or piezoelectric
Patent

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Profile ID: LFUS-PAI-P-631345

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