Loudspeaker
United States Patent 3027964
US Patent References:
Apparatus for reproducing sound
- - 1770234

Loud-speaker horn
- - 1801521

Sound reproducing device
- - 1840992

Acoustic device
- - 1992268

Horn
- - 2001089


Inventors:
Spragins Jr., John D.
Pockman, Leonard T.
Brettell, George A.
Publication Date:
04/03/1962
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Assignee:
Ampex
Primary Class:
181/176
Other Classes:
181/187, D14/208
International Classes:
H04R1/34; H04R1/32
US Patent References:
2037187Sound translating device
2797766Louid speaker
2819771Artificial delay structure for compressional waves
2820525Annular diffusion loudspeaker
Foreign References:
FR473046A
DE372136C