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

D. Broadus Keele, Jr.

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Constant-beamwidth loudspeaker array

Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Loudspeaker operation
Reexamination Certificate

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Defined coverage loudspeaker horn

Acoustics – Sound-modifying means – Intensifying horn
Patent

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Horn loudspeaker

Acoustics – Sound-modifying means – Intensifying horn
Patent

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Log-sampled filter system

Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate

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Loudspeaker horn

Acoustics – Sound-modifying means – Intensifying horn
Patent

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Profile ID: LFUS-PAI-P-1703179

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