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Class Information
Number: 181/153
Name: Acoustics > Diaphragm and enclosure > Rounded enclosure (e.g., curved, etc.)
Description: Subject matter wherein the means to enclose the diaphragm has at least one surface that is circular or curved.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4957184 |
Loudspeaker enclosure |
Sep. 18, 1990 |
| 4948497 |
Acoustically fluidized bed of fine particles |
Aug. 14, 1990 |
| 4928787 |
Mobile speaker system |
May. 29, 1990 |
| 4924962 |
Sound reproducing apparatus for use in vehicle |
May. 15, 1990 |
| 4924965 |
Speaker system |
May. 15, 1990 |
| 4924964 |
Loudspeaker enclosure |
May. 15, 1990 |
| 4905788 |
Electro-acoustic transducers |
Mar. 6, 1990 |
| 4903308 |
Audio transducer with controlled flexibility diaphragm |
Feb. 20, 1990 |
| 4893695 |
Speaker system |
Jan. 16, 1990 |
| 4890689 |
Omnidirectional speaker system |
Jan. 2, 1990 |
| 4877105 |
Rear speaker unit for a motor vehicle |
Oct. 31, 1989 |
| 4865153 |
Speaker system |
Sep. 12, 1989 |
| 4850452 |
Loudspeaker structure |
Jul. 25, 1989 |
| 4836326 |
Optimal shadow omniphonic microphone and loudspeaker system |
Jun. 6, 1989 |
| 4819761 |
Tubular loudspeaker system |
Apr. 11, 1989 |
| 4815559 |
Portable loudspeaker apparatus for use in live performances |
Mar. 28, 1989 |
| 4805730 |
Loudspeaker enclosure |
Feb. 21, 1989 |
| 4805729 |
Speaker enclosure |
Feb. 21, 1989 |
| 4787472 |
Audio speaker apparatus |
Nov. 29, 1988 |
| 4756382 |
Loudspeaker having enhanced response at bass frequencies |
Jul. 12, 1988 |
| 4753317 |
Trapezoidal loudspeaker enclosure |
Jun. 28, 1988 |
| 4735282 |
Device and circuit for the generation of vortex rings |
Apr. 5, 1988 |
| 4730694 |
Electro-mechanical reproduction of sound |
Mar. 15, 1988 |
| 4673057 |
Geometrical transducer arrangements |
Jun. 16, 1987 |
| 4655315 |
Speaker system |
Apr. 7, 1987 |
| 4646349 |
Equipment for the stereophonic sound reproduction in a television receiver |
Feb. 24, 1987 |
| 4638884 |
Chambered headrest mounting for stereophonic loudspeakers |
Jan. 27, 1987 |
| 4618025 |
Acoustical ducting for speakers and enclosures |
Oct. 21, 1986 |
| 4616731 |
Speaker system |
Oct. 14, 1986 |
| 4591020 |
Loudspeaker enclosure with isolation of loudspeaker vibration |
May. 27, 1986 |
| 4588042 |
Parabolic speaker |
May. 13, 1986 |
| 4580654 |
Portable sound speaker system |
Apr. 8, 1986 |
| 4574906 |
Outdoor speaker |
Mar. 11, 1986 |
| 4567959 |
Speaker adapted to corner-loaded installation |
Feb. 4, 1986 |
| 4509192 |
Speaker enclosure |
Apr. 2, 1985 |
| 4501934 |
Loudspeaker system |
Feb. 26, 1985 |
| 4474258 |
Loudspeaker enclosure and waveform energy reflector |
Oct. 2, 1984 |
| 4472605 |
Electrodynamic loudspeaker for low and medium sound frequencies |
Sep. 18, 1984 |
| 4447678 |
Electracoustic transducer |
May. 8, 1984 |
| 4440259 |
Loudspeaker system for producing coherent sound |
Apr. 3, 1984 |
| 4439643 |
System assembly for mounting electrical apparatus on walls and ceilings |
Mar. 27, 1984 |
| 4323138 |
Automotive loud speaker enclosure |
Apr. 6, 1982 |
| 4298087 |
Unidirectional speaker enclosure |
Nov. 3, 1981 |
| 4281738 |
Spherical loudspeaker enclosure |
Aug. 4, 1981 |
| 4268719 |
Loudspeaker arrangements |
May. 19, 1981 |
| 4223760 |
Loudspeaker assembly |
Sep. 23, 1980 |
| 4219099 |
Acoustic reproduction transducer enclosure |
Aug. 26, 1980 |
| 4213008 |
Loudspeaker enclosure for mid-wall location |
Jul. 15, 1980 |
| 4179008 |
Structure and arrangement for loudspeaker assemblage |
Dec. 18, 1979 |
| 4169516 |
Speaker system |
Oct. 2, 1979 |
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