4. Acoustics
  5. Plural diaphragm sound sources
  6. Plural chambers

Theodore J. Humphrey

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Audio amplifier

Amplifiers – With semiconductor amplifying device – Including particular power supply circuitry
Patent

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Speaker system which inverts and redirects the speaker backwave

Acoustics – Plural diaphragm sound sources – Plural chambers
Patent

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Profile ID: LFUS-PAI-P-1349485

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