Title:
Louid speaker
United States Patent 2797766
US Patent References:
/1220669.html
- - 1220669

Self-sealing petrol tank or other container
- - 1453305

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- - 1730528

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- - 1730531

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- - 1730532


Inventors:
Sullivan, Herbert W.
Publication Date:
07/02/1957
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Assignee:
DAVID BOGEN & COMPANY INC
Primary Class:
181/151
Other Classes:
181/152, 381/345
International Classes:
H04R1/28; H04R1/42; H04R1/00
US Patent References:
1748407Loud-speaker unit
1755552Driving unit for speakers
2115129Loudspeaker
2200297Combined phonograph and radio
2231791Process for preserving food
2277525Sound amplifier
2338262Acoustic horn
2604182Loud-speaker with a tapered horn coupled to the speaker diaphragm
2640556Loud-speaker diaphragm and mounting
2665459Closure seal