4. Amplifiers
  5. With semiconductor amplifying device
  6. Including differential amplifier

John S. French

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Directional microphone assembly

Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate

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Directional microphone assembly

Electrical audio signal processing systems and devices – Hearing aids – electrical – Directional
Reexamination Certificate

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Directional microphone assembly

Electrical audio signal processing systems and devices – Hearing aids – electrical – Directional
Reexamination Certificate

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Hearing aid assembly having external directional microphone

Electrical audio signal processing systems and devices – Hearing aids – electrical – Directional
Reexamination Certificate

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Pre-amplifier

Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent

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Profile ID: LFUS-PAI-P-395319

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