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Class Information
Number: 181/194
Name: Acoustics > Sound-modifying means > Intensifying horn > Particular shape of the horn > Doubly folded sound path
Description: Subject matter wherein the wall of the horn is arranged to provide a sound path which changes direction by substantially 180 degrees at least twice.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7190801 |
Horn loudspeaker |
Mar. 13, 2007 |
| 6712177 |
Cross-fired multiple horn loudspeaker system |
Mar. 30, 2004 |
| 5327985 |
Acoustical transducer enclosure |
Jul. 12, 1994 |
| 5233136 |
Horn loadspeaker |
Aug. 3, 1993 |
| 5181301 |
Method of making a very compact audio warning system |
Jan. 26, 1993 |
| 5111905 |
Speaker enclosure |
May. 12, 1992 |
| 4982436 |
Dual horn folded soundpath loudspeaker |
Jan. 1, 1991 |
| 4896134 |
Armored self-contained outdoor/indoor siren assembly |
Jan. 23, 1990 |
| 4893343 |
Dual diverging manifold loudspeaker system |
Jan. 9, 1990 |
| 4865159 |
Acoustic horn and attachment device |
Sep. 12, 1989 |
| 4860367 |
Low frequency loud speaker |
Aug. 22, 1989 |
| 4853964 |
Electroacoustic apparatus for reproducing lowest to medium frequencies |
Aug. 1, 1989 |
| 4790408 |
Coiled exponential bass/midrange horn loudspeakers |
Dec. 13, 1988 |
| 4210223 |
Low frequency folded exponential horn loudspeaker apparatus with bifurcated sound path |
Jul. 1, 1980 |
| 4168761 |
Symmetrical air friction enclosure for speakers |
Sep. 25, 1979 |
| 4116302 |
Horn loudspeaker |
Sep. 26, 1978 |
| 3993162 |
Acoustic speaker system |
Nov. 23, 1976 |
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