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Class Information
Number: 181/177
Name: Acoustics > Sound-modifying means > Intensifying horn
Description: Subject matter comprising a hollow member open at opposite ends and having a progressively increasing cross sectional area from one end to the other. Sound is introduced at the smaller open end and emerges increased in loudness at the larger open end.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7506721 |
Convertible folded horn enclosure |
Mar. 24, 2009 |
| 7454030 |
Subwoofer with cascaded linear array of drivers |
Nov. 18, 2008 |
| 7299893 |
Loudspeaker horn and method for controlling grating lobes in a line array of acoustic sources |
Nov. 27, 2007 |
| 7252176 |
Reflex-ported folded horn enclosure |
Aug. 7, 2007 |
| 7095868 |
Phase plug with optimum aperture shapes |
Aug. 22, 2006 |
| 7027605 |
Mid-range loudspeaker |
Apr. 11, 2006 |
| 6837334 |
Acoustic horn |
Jan. 4, 2005 |
| 6668969 |
Manifold for a horn loudspeaker and method |
Dec. 30, 2003 |
| 6658128 |
Horn loudspeaker |
Dec. 2, 2003 |
| 6574344 |
Directional horn speaker system |
Jun. 3, 2003 |
| 6530451 |
System of elements for the diffusion of sound in rooms deligated to the reproduction of music and speech |
Mar. 11, 2003 |
| 6519348 |
Speaker apparatus and television set |
Feb. 11, 2003 |
| 6516076 |
Modular horn loudspeaker |
Feb. 4, 2003 |
| 6478109 |
Laminated composite panel-form loudspeaker |
Nov. 12, 2002 |
| 6466680 |
High-frequency loudspeaker module for cinema screen |
Oct. 15, 2002 |
| 6394223 |
Loudspeaker with differential energy distribution in vertical and horizontal planes |
May. 28, 2002 |
| 6368553 |
Ultrasonic force differentiation assay |
Apr. 9, 2002 |
| 6334505 |
Optimum edges for speakers and musical instruments |
Jan. 1, 2002 |
| 6129173 |
Personal removable mouthpiece for a voice amplification instrument and method of using same |
Oct. 10, 2000 |
| 6059069 |
Loudspeaker waveguide design |
May. 9, 2000 |
| 5991421 |
Radially expanding multiple flat-surfaced waveguide device |
Nov. 23, 1999 |
| 5910648 |
Sound generator |
Jun. 8, 1999 |
| 5828627 |
Method of and apparatus for producing spherical waves in the ultrasonic range |
Oct. 27, 1998 |
| 5726396 |
Folded acoustical horn |
Mar. 10, 1998 |
| 5540248 |
Fluidic sound amplification system |
Jul. 30, 1996 |
| 5501363 |
Combination drinking cup and megaphone |
Mar. 26, 1996 |
| 5351220 |
Moving-coil electrodynamic electroacoustical transducer |
Sep. 27, 1994 |
| 5327985 |
Acoustical transducer enclosure |
Jul. 12, 1994 |
| 4969196 |
Speaker and horn array |
Nov. 6, 1990 |
| 4964100 |
Acoustic detection system |
Oct. 16, 1990 |
| 4865159 |
Acoustic horn and attachment device |
Sep. 12, 1989 |
| 4808202 |
Adsorptive fiber sheet |
Feb. 28, 1989 |
| 4805732 |
Motor powered sound emitter |
Feb. 21, 1989 |
| 4739860 |
Ultrasonic rangefinder |
Apr. 26, 1988 |
| 4525604 |
Horn loudspeaker with convex diaphragm |
Jun. 25, 1985 |
| 4433398 |
Ultrasonic transducer |
Feb. 21, 1984 |
| 4378471 |
Horn speaker with linear grooves in a front surface of a pole piece of a yoke |
Mar. 29, 1983 |
| 4329905 |
Sound generating apparatus |
May. 18, 1982 |
| 4125218 |
Megaphone-cup |
Nov. 14, 1978 |
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