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

Isao Fushimi

Inventor

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Audible signal for alarm units

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Aural – i.e. – audible
Patent

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Earphone

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

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Earphone

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment
Design Patent

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Earphone with microphone

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Speaker or housing therefor
Design Patent

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Electroacoustic transducer

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

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Profile ID: LFUS-PAI-P-865568

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