4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Plural or compound reproducers

James T. MacDonald

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Earhook headset

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent

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Earphone with adjustable headband with progressively shallow det

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

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Flexible earhook

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

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Headband for reversible mounting of headsets

Telephonic communications – Terminal – Housing or housing component
Reexamination Certificate

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Microphone

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Thermal response to – or generation of – sound vibration
Patent

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Profile ID: LFUS-PAI-P-652564

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