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Class Information
Number: 381/184
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Plural or compound reproducers > Different types of diaphragms
Description: Subject matter having two or more flexible membranes which differ in size, shape or composition.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7460679 |
Flat panel speaker system with a coated diaphragm |
Dec. 2, 2008 |
| 7418109 |
Diaphragm structure of light sound converter |
Aug. 26, 2008 |
| 7120264 |
Sound reproducing apparatus |
Oct. 10, 2006 |
| 6963650 |
Coaxial speaker with step-down ledge to eliminate sound wave distortions and time delay |
Nov. 8, 2005 |
| 6888946 |
High frequency loudspeaker |
May. 3, 2005 |
| 6834113 |
Loudspeaker system |
Dec. 21, 2004 |
| 6804371 |
Speaker having a laser vibration diaphragm |
Oct. 12, 2004 |
| 6778675 |
Speaker device |
Aug. 17, 2004 |
| 6535612 |
Electroacoustic transducer with diaphragm securing structure and method |
Mar. 18, 2003 |
| 6466676 |
Compound driver for acoustical applications |
Oct. 15, 2002 |
| 6445803 |
Speaker |
Sep. 3, 2002 |
| 6351542 |
Loudspeakers with panel-form acoustic radiating elements |
Feb. 26, 2002 |
| 6236733 |
Loudspeaker |
May. 22, 2001 |
| 6095278 |
Base for holding the tweeter of a speaker |
Aug. 1, 2000 |
| 6097821 |
Electrostatic capacitance type transducer |
Aug. 1, 2000 |
| 5295194 |
Multi-driver loudspeaker assembly |
Mar. 15, 1994 |
| 5245669 |
Electroacoustic transducer |
Sep. 14, 1993 |
| 5181253 |
Loudspeaker assembly |
Jan. 19, 1993 |
| 5180785 |
Diaphragm and method for producing same |
Jan. 19, 1993 |
| 5153915 |
Speaker filtering circuit and support therefor |
Oct. 6, 1992 |
| 5150417 |
Bass reflex type speaker system |
Sep. 22, 1992 |
| 5115882 |
Omnidirectional dispersion system for multiway loudspeakers |
May. 26, 1992 |
| 5098976 |
Acoustic material |
Mar. 24, 1992 |
| 5073945 |
Loudspeaker system |
Dec. 17, 1991 |
| 5062139 |
Coaxial loud speaker system |
Oct. 29, 1991 |
| 5022488 |
Transducer enclosure |
Jun. 11, 1991 |
| 4965839 |
Electro acoustic transducer and loudspeaker |
Oct. 23, 1990 |
| 4940108 |
Open line source speaker system |
Jul. 10, 1990 |
| 4899390 |
Thin speaker having an enclosure within an open portion and a closed portion |
Feb. 6, 1990 |
| 4829581 |
Electrodynamic transducer comprising a two-part diaphragm |
May. 9, 1989 |
| 4821330 |
Wide-band loudspeaker having a diaphragm area divided into sub-areas for various frequency ranges |
Apr. 11, 1989 |
| 4821323 |
Stereo headphone |
Apr. 11, 1989 |
| 4764968 |
Disk diaphragm for a loudspeaker |
Aug. 16, 1988 |
| 4761817 |
Diaphragm structure for a transducer |
Aug. 2, 1988 |
| 4727586 |
High fidelity speaker system and assembly |
Feb. 23, 1988 |
| 4726068 |
Boom mounted microphone and connector |
Feb. 16, 1988 |
| 4706295 |
Coaxial loudspeaker system |
Nov. 10, 1987 |
| 4477699 |
Mechanical two-way loudspeaker |
Oct. 16, 1984 |
| 4475014 |
Acoustical transducer |
Oct. 2, 1984 |
| 4332986 |
Speaker system employing passive radiator |
Jun. 1, 1982 |
| 3962544 |
Sound reproducing devices |
Jun. 8, 1976 |
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