4. Acoustics
  5. Diaphragm and enclosure
  6. Recessed

Daniel L. Queen

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Ceiling-mounted loudspeaker

Acoustics – Diaphragm and enclosure – Recessed
Patent

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Ceiling-mounted loudspeaker

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

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Loudspeaker overload circuit

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent

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Narrow angle cylindrical wave full range loudspeaker system

Acoustics – Plural diaphragm sound sources – Three diaphragms
Patent

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Wide range magnetically biased reed switch

Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Vacuum or hermetically sealed type
Patent

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Profile ID: LFUS-PAI-P-273459

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