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Class Information
Number: 181/167
Name: Acoustics > Diaphragm > Critically defined material or coating
Description: Subject matter wherein the diaphragm is constructed of specific material or the diaphragm is covered or saturated, at least in part, with extraneous material.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5205897 |
Method of bonding loudspeaker diaphragm |
Apr. 27, 1993 |
| 5149486 |
Method for manufacturing speaker vibration member |
Sep. 22, 1992 |
| 5080743 |
Process for preparation of a wholly carbonaceous diaphragm for acoustic equipment use |
Jan. 14, 1992 |
| 5033093 |
Compact microphone and method of manufacture |
Jul. 16, 1991 |
| 4996119 |
Speaker cone plate and method of forming |
Feb. 26, 1991 |
| 4912086 |
Electroacoustic transducer comprising a superconducting element |
Mar. 27, 1990 |
| 4847981 |
Method for producing a diaphragm for acoustic appliances |
Jul. 18, 1989 |
| 4783821 |
IC processed piezoelectric microphone |
Nov. 8, 1988 |
| 4772513 |
Method for forming a hard carbon thin film on article and applications thereof |
Sep. 20, 1988 |
| 4761817 |
Diaphragm structure for a transducer |
Aug. 2, 1988 |
| 4726443 |
Diaphragm |
Feb. 23, 1988 |
| 4699242 |
Magnetic speaker |
Oct. 13, 1987 |
| 4639283 |
Method for making a diaphragm for an electro-acoustic transducer |
Jan. 27, 1987 |
| 4550797 |
Loudspeaker diaphragm made of a molded, sintered ceramic body |
Nov. 5, 1985 |
| 4518642 |
Loudspeaker diaphragm and method for making same |
May. 21, 1985 |
| 4518443 |
Acoustic diaphragm |
May. 21, 1985 |
| 4517416 |
Electro-acoustic transducer having a diaphragm comprising a layer of polymethacrylimide foam |
May. 14, 1985 |
| 4508192 |
Microphone diaphragm |
Apr. 2, 1985 |
| 4478309 |
Speaker equipped with diaphragm filled with foamed resin |
Oct. 23, 1984 |
| 4471085 |
Diaphragm material for loudspeakers |
Sep. 11, 1984 |
| 4427846 |
Moving coil loudspeakers |
Jan. 24, 1984 |
| 4412103 |
Diaphragm for an electro-acoustic transducer |
Oct. 25, 1983 |
| 4410768 |
Electro-acoustic transducer |
Oct. 18, 1983 |
| 4395814 |
Acoustic vibrating element of graphite and method of manufacturing same |
Aug. 2, 1983 |
| 4377617 |
Loudspeaker diaphragm and process for producing same |
Mar. 22, 1983 |
| 4352407 |
Diaphragms for acoustic instruments and method of producing the same |
Oct. 5, 1982 |
| 4343376 |
Vibratory elements for audio equipment |
Aug. 10, 1982 |
| 4340786 |
Piezo-electric film manufacture |
Jul. 20, 1982 |
| 4315112 |
Speaker |
Feb. 9, 1982 |
| 4300655 |
Acoustic diaphragm for speakers and method of producing the same |
Nov. 17, 1981 |
| 4295011 |
Linear excursion-constant inductance loudspeaker |
Oct. 13, 1981 |
| 4291205 |
Laminated loudspeaker diaphragm with honeycomb core and damping layers |
Sep. 22, 1981 |
| 4281223 |
Electro-acoustic transducer |
Jul. 28, 1981 |
| 4254184 |
Vibrating member for acoustic transducer and method for manufacturing the same |
Mar. 3, 1981 |
| 4221773 |
Method of producing a carbon diaphragm for an acoustic instrument |
Sep. 9, 1980 |
| 4198550 |
Peripherally reinforced laminated loudspeaker diaphragm |
Apr. 15, 1980 |
| 4190746 |
Diaphragm material for moving coil loudspeaker, may be laminated or integral with surround |
Feb. 26, 1980 |
| 4140203 |
Acoustic diaphragm with polyurethane elastomer coating |
Feb. 20, 1979 |
| 4135601 |
Boron coated diaphragm for use in a loud speaker |
Jan. 23, 1979 |
| 4129195 |
Diaphragm for speaker |
Dec. 12, 1978 |
| 4128138 |
Diaphragm for speaker |
Dec. 5, 1978 |
| 4100992 |
Loudspeaker |
Jul. 18, 1978 |
| 4086449 |
Loudspeaker with burning resistant diaphragm |
Apr. 25, 1978 |
| 4071111 |
Weatherproof loudspeaker assembly and method of making same |
Jan. 31, 1978 |
| 4029171 |
Membrane for electroacoustic converter systems |
Jun. 14, 1977 |
| 4026384 |
Reconstituted mica acoustic diaphragm |
May. 31, 1977 |
| 3961378 |
Cone construction for loudspeaker |
Jun. 8, 1976 |
| 3946832 |
Diaphragm for loud speaker |
Mar. 30, 1976 |
| 3939942 |
Electroacoustic transducers |
Feb. 24, 1976 |
| 3937905 |
Moving voice coil transducer having a flat diaphragm of an impregnated knit |
Feb. 10, 1976 |
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