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Class Information
Number: 181/182
Name: Acoustics > Sound-modifying means > Intensifying horn > With resonant chamber
Description: Subject matter including a compartment exterior to the basic horn shape, but in communication with the horn via a sound passage or a vibrating portion of the horn wall.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7525794 |
Expandable acoustic chamber for computer systems |
Apr. 28, 2009 |
| 6981570 |
Loudspeaker system with common low and high frequency horn mounting |
Jan. 3, 2006 |
| 6836239 |
Method and system for displaying text on a radial display |
Dec. 28, 2004 |
| 6831984 |
Noise reducing |
Dec. 14, 2004 |
| 6807284 |
Speaker and speaker device |
Oct. 19, 2004 |
| 6648098 |
Spiral acoustic waveguide electroacoustical transducing system |
Nov. 18, 2003 |
| 6581719 |
Wave shaping sound chamber |
Jun. 24, 2003 |
| 6522759 |
Speaker |
Feb. 18, 2003 |
| 6430297 |
Speaker and speaker device |
Aug. 6, 2002 |
| 6425456 |
Hollow semicircularly curved loudspeaker enclosure |
Jul. 30, 2002 |
| 6335974 |
Speaker system for television receiver with sound ducts and perforated panels |
Jan. 1, 2002 |
| 6083075 |
Animal call device |
Jul. 4, 2000 |
| 6059069 |
Loudspeaker waveguide design |
May. 9, 2000 |
| 6001132 |
Preparation of aqueous solutions suitable for finishing cellulose containing textile materials |
Dec. 14, 1999 |
| 5932850 |
Speaker system |
Aug. 3, 1999 |
| 5929392 |
Speaker system |
Jul. 27, 1999 |
| 5805708 |
Speaker system for computer |
Sep. 8, 1998 |
| 5793000 |
Speaker system |
Aug. 11, 1998 |
| 5631450 |
Megaphone |
May. 20, 1997 |
| 5606297 |
Conical ultrasound waveguide |
Feb. 25, 1997 |
| 5550921 |
Stereo sound source for portable computer |
Aug. 27, 1996 |
| 5394478 |
Low frequency sound generation system for use in vehicular passenger compartments |
Feb. 28, 1995 |
| 5233136 |
Horn loadspeaker |
Aug. 3, 1993 |
| 5184332 |
Multiport underwater sound transducer |
Feb. 2, 1993 |
| 5179255 |
Baseball bat having the functions of resonators and microphones |
Jan. 12, 1993 |
| 5160815 |
Megaphone apparatus |
Nov. 3, 1992 |
| 5068836 |
Sound generating transducer |
Nov. 26, 1991 |
| 4989187 |
Acoustic apparatus |
Jan. 29, 1991 |
| 4987564 |
Acoustic apparatus |
Jan. 22, 1991 |
| 4546733 |
Resonator for internal combustion engines |
Oct. 15, 1985 |
| 4539947 |
Resonator for internal combustion engines |
Sep. 10, 1985 |
| 4421957 |
End-fire microphone and loudspeaker structures |
Dec. 20, 1983 |
| 4413253 |
Miniature sounder with double tuned cavity |
Nov. 1, 1983 |
| 4299304 |
Exponential folded horn speaker enclosure |
Nov. 10, 1981 |
| 4268718 |
Housing acoustical amplifier |
May. 19, 1981 |
| 4033431 |
Acoustic crossover speaker enclosure |
Jul. 5, 1977 |
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