| |
 |
|
Class Information
Number: 181/184
Name: Acoustics > Sound-modifying means > Intensifying horn > Having apertures in walls
Description: Subject matter wherein the horn has sides which are provided with openings.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7181025 |
Ultrasound based parametric loudspeaker system |
Feb. 20, 2007 |
| 7134523 |
System for integrating mid-range and high-frequency acoustic sources in multi-way loudspeakers |
Nov. 14, 2006 |
| 7130438 |
Acoustic enclosure for single audio transducer |
Oct. 31, 2006 |
| 6986260 |
Electrical fan system for vehicle |
Jan. 17, 2006 |
| 6931143 |
Thin enclosure electroacoustical transducing |
Aug. 16, 2005 |
| 6628790 |
Apparatus for on-ear operation and off-ear operation with two sound reproduction transducers |
Sep. 30, 2003 |
| 6160897 |
Apparatus for operation in an on-ear mode and an off-ear mode |
Dec. 12, 2000 |
| 6116373 |
Acoustic horns for loudspeakers |
Sep. 12, 2000 |
| 5945642 |
Acoustic horn |
Aug. 31, 1999 |
| 5837890 |
Jet engine test cell structure |
Nov. 17, 1998 |
| 5740259 |
Pressure wave transducing |
Apr. 14, 1998 |
| 5659155 |
Acoustical transducer enclosure |
Aug. 19, 1997 |
| 5327985 |
Acoustical transducer enclosure |
Jul. 12, 1994 |
| 5233136 |
Horn loadspeaker |
Aug. 3, 1993 |
| 5179255 |
Baseball bat having the functions of resonators and microphones |
Jan. 12, 1993 |
| 5137110 |
Highly directional sound projector and receiver apparatus |
Aug. 11, 1992 |
| 5115883 |
Loudspeaker |
May. 26, 1992 |
| 4989187 |
Acoustic apparatus |
Jan. 29, 1991 |
| 4987564 |
Acoustic apparatus |
Jan. 22, 1991 |
| 4893695 |
Speaker system |
Jan. 16, 1990 |
| 4619342 |
Multiple sound transducer system utilizing an acoustic filter to reduce distortion |
Oct. 28, 1986 |
| 4421957 |
End-fire microphone and loudspeaker structures |
Dec. 20, 1983 |
| 4419545 |
Electret transducer |
Dec. 6, 1983 |
| 4381831 |
High frequency horn |
May. 3, 1983 |
| 4299304 |
Exponential folded horn speaker enclosure |
Nov. 10, 1981 |
| 4283606 |
Coaxial loudspeaker system |
Aug. 11, 1981 |
| 3944757 |
High-fidelity moving-coil loudspeaker |
Mar. 16, 1976 |
|
|
|
