4. Communications, electrical: acoustic wave systems and devices
  5. Signal transducers
  6. Underwater type

Hachishiro Kobayashi

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Diaphragm for use with an electro-acoustic transducer and method

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent

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Speaker device

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate

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Speaker unit

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

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Profile ID: LFUS-PAI-P-998418

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