4. Acoustics
  5. Sound-modifying means
  6. Intensifying horn

Altec Corporation

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Acoustical transformer for compression-type loudspeaker with an

Acoustics – Diaphragm – With horn
Patent

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Acoustical transformer for coupling sound waves from the diaphra

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent

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Acoustical transformer for horn-type loudspeaker

Acoustics – Diaphragm – With horn
Patent

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Adjustably positioned phasing plug

Patent

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Electronic filter circuit

Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent

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Profile ID: LFUS-PAI-P-190350

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