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Class Information
Number: 181/147
Name: Acoustics > Plural diaphragm sound sources > Three diaphragms
Description: Subject matter including at least three vibrated means per unit.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7577265 |
Loudspeaker system providing improved sound presence and frequency response in mid and high frequency ranges |
Aug. 18, 2009 |
| 7553288 |
Sound and vibration transmission pad and system |
Jun. 30, 2009 |
| 7418104 |
Speaker system |
Aug. 26, 2008 |
| 7350618 |
Multimedia speaker product |
Apr. 1, 2008 |
| 7333626 |
Arbitrary coverage angle sound integrator |
Feb. 19, 2008 |
| 7225895 |
Audio speaker with wobble free voice coil movement |
Jun. 5, 2007 |
| 7185735 |
Audio speaker with wobble free voice coil movement |
Mar. 6, 2007 |
| 7134523 |
System for integrating mid-range and high-frequency acoustic sources in multi-way loudspeakers |
Nov. 14, 2006 |
| 6118883 |
System for controlling low frequency acoustical directivity patterns and minimizing directivity discontinuities during frequency transitions |
Sep. 12, 2000 |
| 6057659 |
Speaker apparatus |
May. 2, 2000 |
| 5874695 |
Speaker assembly |
Feb. 23, 1999 |
| 5847331 |
Omnidirectional loudspeaker |
Dec. 8, 1998 |
| 5802191 |
Loudspeakers, systems, and components thereof |
Sep. 1, 1998 |
| 5715322 |
Throat device interconnecting a plurality of drive units and a horn |
Feb. 3, 1998 |
| 5594804 |
Multiple cone type loudspeaker |
Jan. 14, 1997 |
| 5590214 |
Vertical array type speaker system |
Dec. 31, 1996 |
| 5553149 |
Theater sound for multimedia workstations |
Sep. 3, 1996 |
| 5374124 |
Multi-compound isobarik loudspeaker system |
Dec. 20, 1994 |
| 5324896 |
Audio loudspeaker system |
Jun. 28, 1994 |
| 5307418 |
Center channel speaker having multiple interconnected backload amplifying chambers for surround sound stereo audio systems |
Apr. 26, 1994 |
| 5258584 |
Multiple auxiliary compound driver loudspeaker system |
Nov. 2, 1993 |
| 5222145 |
Dual-chamber multi-channel speaker for surround sound stereo audio systems |
Jun. 22, 1993 |
| 5164549 |
Sonic wave generator |
Nov. 17, 1992 |
| 5000286 |
Modular loudspeaker system |
Mar. 19, 1991 |
| 4991687 |
Speaker system having directivity |
Feb. 12, 1991 |
| 4940108 |
Open line source speaker system |
Jul. 10, 1990 |
| 4923031 |
High output loudspeaker system |
May. 8, 1990 |
| 4890689 |
Omnidirectional speaker system |
Jan. 2, 1990 |
| 4884655 |
Tower-type speaker cabinet with pivoted plural speaker subassembly |
Dec. 5, 1989 |
| 4869340 |
Very high performance loudspeaker enclosures |
Sep. 26, 1989 |
| 4836326 |
Optimal shadow omniphonic microphone and loudspeaker system |
Jun. 6, 1989 |
| 4792978 |
Planar loudspeaker system |
Dec. 20, 1988 |
| 4787472 |
Audio speaker apparatus |
Nov. 29, 1988 |
| 4733749 |
High output loudspeaker for low frequency reproduction |
Mar. 29, 1988 |
| 4730694 |
Electro-mechanical reproduction of sound |
Mar. 15, 1988 |
| 4673057 |
Geometrical transducer arrangements |
Jun. 16, 1987 |
| 4657107 |
Loudspeaker cabinet |
Apr. 14, 1987 |
| 4653606 |
Electroacoustic device with broad frequency range directional response |
Mar. 31, 1987 |
| 4637490 |
Jellyfish array |
Jan. 20, 1987 |
| 4629029 |
Multiple driver manifold |
Dec. 16, 1986 |
| 4624337 |
Speaker enclosure |
Nov. 25, 1986 |
| 4593784 |
Loudspeaker enclosure |
Jun. 10, 1986 |
| 4558762 |
Loudspeaker |
Dec. 17, 1985 |
| 4524846 |
Loudspeaker system |
Jun. 25, 1985 |
| 4503930 |
Loudspeaker system |
Mar. 12, 1985 |
| RE31679 |
Loudspeaker enclosure with acoustical compliance resonating with port mass at frequency below system resonance |
Sep. 18, 1984 |
| 4450322 |
Adjustable speaker system and method of adjustment |
May. 22, 1984 |
| 4441577 |
Direction-variable speaker system |
Apr. 10, 1984 |
| 4437540 |
Loud-speaker |
Mar. 20, 1984 |
| 4410063 |
Loudspeaker system |
Oct. 18, 1983 |
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