Acoustic system for loud-speakers
United States Patent 2694462
US Patent References:
Sound reproducer
- - 1865735

Acoustic apparatus
- - 1912454

Acoustic device
- - 1969704

Acoustic device
- - 1984542

Acoustical apparatus
- - 2193399


Inventors:
Frank, Robbins
William, Joseph
Publication Date:
11/16/1954
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Assignee:
Frank, Robbins
William, Joseph
Primary Class:
181/155
Other Classes:
181/199
International Classes:
H04R1/26; H04R1/28; H04R1/22
US Patent References:
2373692Loud-speaker
2604182Loud-speaker with a tapered horn coupled to the speaker diaphragm
Foreign References:
FR971128A