4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Having acoustic wave modifying structure

Juha Backman

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Method and arrangement for improving leak tolerance of an...

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

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Method and arrangement for improving leak tolerance of an...

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure
Reexamination Certificate

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Speaker

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

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Profile ID: LFUS-PAI-P-2599372

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