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Class Information
Number: 181/144
Name: Acoustics > Plural diaphragm sound sources
Description: Subject matter including at least two separate means that can be vibrated by sound waves or produce sound waves.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4665550 |
Electrodynamic loudspeaker having omnidirectional sound emission |
May. 12, 1987 |
| 4658932 |
Simulated binaural recording system |
Apr. 21, 1987 |
| 4657107 |
Loudspeaker cabinet |
Apr. 14, 1987 |
| 4640381 |
Wall-mounted resin speaker cabinet |
Feb. 3, 1987 |
| 4637490 |
Jellyfish array |
Jan. 20, 1987 |
| 4633229 |
Electronic outdoor warning siren |
Dec. 30, 1986 |
| 4629029 |
Multiple driver manifold |
Dec. 16, 1986 |
| 4625829 |
Speaker grill |
Dec. 2, 1986 |
| 4624338 |
Loudspeaker enclosure for a vibrating diaphragm loudspeaker |
Nov. 25, 1986 |
| 4621708 |
Tweeter bidirectional radiating |
Nov. 11, 1986 |
| 4619342 |
Multiple sound transducer system utilizing an acoustic filter to reduce distortion |
Oct. 28, 1986 |
| 4601361 |
Structure for mounting loudspeaker on electronic musical instrument |
Jul. 22, 1986 |
| 4598789 |
Sound reproducing |
Jul. 8, 1986 |
| 4597470 |
Car speaker system |
Jul. 1, 1986 |
| 4593784 |
Loudspeaker enclosure |
Jun. 10, 1986 |
| 4590333 |
Multidriver loudspeaker |
May. 20, 1986 |
| 4588042 |
Parabolic speaker |
May. 13, 1986 |
| 4582162 |
Automobile speaker unit |
Apr. 15, 1986 |
| 4569414 |
Augmented speaker enclosure |
Feb. 11, 1986 |
| 4554414 |
Multi-driver loudspeaker |
Nov. 19, 1985 |
| 4553630 |
Speaker with tweeter angle adjusting device |
Nov. 19, 1985 |
| 4552242 |
Coaxial type composite loudspeaker |
Nov. 12, 1985 |
| 4517416 |
Electro-acoustic transducer having a diaphragm comprising a layer of polymethacrylimide foam |
May. 14, 1985 |
| 4511768 |
Mounting arrangement for altering a microphone's frequency response |
Apr. 16, 1985 |
| 4509184 |
Stereo sound system |
Apr. 2, 1985 |
| 4503553 |
Loudspeaker system |
Mar. 5, 1985 |
| 4497981 |
Multi-driver loudspeaker |
Feb. 5, 1985 |
| 4492826 |
Loudspeaker |
Jan. 8, 1985 |
| 4477699 |
Mechanical two-way loudspeaker |
Oct. 16, 1984 |
| 4473721 |
High-frequency loud speaker |
Sep. 25, 1984 |
| 4472605 |
Electrodynamic loudspeaker for low and medium sound frequencies |
Sep. 18, 1984 |
| 4466505 |
Sound reproducing combination |
Aug. 21, 1984 |
| 4452333 |
Speaker system |
Jun. 5, 1984 |
| 4421200 |
Elliptically shaped transducer enclosure |
Dec. 20, 1983 |
| 4420061 |
Pentagonal speaker enclosure with a downward directed dynamic damping system |
Dec. 13, 1983 |
| 4418243 |
Acoustic projection stereophonic system |
Nov. 29, 1983 |
| 4408678 |
Loudspeaker enclosure |
Oct. 11, 1983 |
| 4399328 |
Direction and frequency independent column of electro-acoustic transducers |
Aug. 16, 1983 |
| 4365113 |
Speaker unit for automotive vehicles |
Dec. 21, 1982 |
| 4365114 |
Automotive loudspeaker having variable speaker orientation and particular electrical connections |
Dec. 21, 1982 |
| 4336861 |
Speaker system |
Jun. 29, 1982 |
| 4334593 |
Sound reproduction system |
Jun. 15, 1982 |
| 4332986 |
Speaker system employing passive radiator |
Jun. 1, 1982 |
| 4330691 |
Integral ceiling tile-loudspeaker system |
May. 18, 1982 |
| 4314620 |
Loudspeaker with cone driven horn |
Feb. 9, 1982 |
| 4303142 |
Combined acoustical transducer and grille |
Dec. 1, 1981 |
| 4301332 |
Woofer loudspeaker |
Nov. 17, 1981 |
| 4299304 |
Exponential folded horn speaker enclosure |
Nov. 10, 1981 |
| 4283606 |
Coaxial loudspeaker system |
Aug. 11, 1981 |
| 4268719 |
Loudspeaker arrangements |
May. 19, 1981 |
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