4. Electrical audio signal processing systems and devices
  5. Headphone circuits

David E. Christian

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Apparatus for controlling light distribution in line scan optica

Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent

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Method and apparatus for producing folded optical path devices

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Portable musical instrument amplifier

Electrical audio signal processing systems and devices – Headphone circuits
Patent

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Portable musical instrument amplifier

Electrical audio signal processing systems and devices – Headphone circuits
Patent

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Portable musical instrument amplifier with a movable plug

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

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Profile ID: LFUS-PAI-P-431936

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