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Class Information
Number: 181/189
Name: Acoustics > Sound-modifying means > Intensifying horn > Multisection housing
Description: Subject matter wherein the structure forming the sound intensifying horn comprises two or more units attached together. Each unit must include part of a given sound path.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7350618 |
Multimedia speaker product |
Apr. 1, 2008 |
| 7113813 |
Mobile communication terminal and electro-acoustic transducer used for the same |
Sep. 26, 2006 |
| 7095868 |
Phase plug with optimum aperture shapes |
Aug. 22, 2006 |
| 6931143 |
Thin enclosure electroacoustical transducing |
Aug. 16, 2005 |
| 6719090 |
Speaker assembly |
Apr. 13, 2004 |
| 6604602 |
Separable speaker cover box containing speaker system |
Aug. 12, 2003 |
| 6522759 |
Speaker |
Feb. 18, 2003 |
| 6513622 |
Full-range loudspeaker system for cinema screen |
Feb. 4, 2003 |
| 6278789 |
Frequency selective acoustic waveguide damping |
Aug. 21, 2001 |
| 6035962 |
Easily-combinable and movable speaker case |
Mar. 14, 2000 |
| 5675133 |
Horn and sounder |
Oct. 7, 1997 |
| 5659155 |
Acoustical transducer enclosure |
Aug. 19, 1997 |
| 5631450 |
Megaphone |
May. 20, 1997 |
| 5606297 |
Conical ultrasound waveguide |
Feb. 25, 1997 |
| 5397866 |
Dual acoustic horn assembly |
Mar. 14, 1995 |
| 5160815 |
Megaphone apparatus |
Nov. 3, 1992 |
| 5046581 |
Loudspeaker system |
Sep. 10, 1991 |
| 5025887 |
Sanitary acoustic horn |
Jun. 25, 1991 |
| 4893695 |
Speaker system |
Jan. 16, 1990 |
| 4776428 |
Sound projection system |
Oct. 11, 1988 |
| 4369857 |
Loudspeaker and horn combination |
Jan. 25, 1983 |
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