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Class Information
Number: 381/422
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Electromagnetic (e.g., dyynamic) > Magnetic circuit > Having central magnetic portion > Plural magnets > Like poles adjacent
Description: Subject matter in which respective regions of either north magnetic polarity or south magnetic polarity of two magnets are juxtaposed.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7433487 |
Speaker |
Oct. 7, 2008 |
| 7263199 |
Microphone assembly |
Aug. 28, 2007 |
| 7227970 |
Shorting ring fixture for electromagnetic transducer |
Jun. 5, 2007 |
| 7103195 |
Speaker unit |
Sep. 5, 2006 |
| 7058195 |
Speaker assembly |
Jun. 6, 2006 |
| 6671385 |
Speaker and magnetic circuit used for the speaker |
Dec. 30, 2003 |
| 6600399 |
Transducer motor/generator assembly |
Jul. 29, 2003 |
| 6473515 |
Cap and center pole apparatus and method of coupling |
Oct. 29, 2002 |
| 6289106 |
Cap and center pole apparatus and method of coupling |
Sep. 11, 2001 |
| 5841880 |
Multi-point drive type speaker |
Nov. 24, 1998 |
| 5461677 |
Loudspeaker |
Oct. 24, 1995 |
| 5452366 |
Loudspeaker |
Sep. 19, 1995 |
| 5371806 |
Loudspeaker |
Dec. 6, 1994 |
| 5214710 |
Permanent magnet system with associated coil arrangement |
May. 25, 1993 |
| 5070530 |
Electroacoustic transducers with increased magnetic stability for distortion reduction |
Dec. 3, 1991 |
| 4868882 |
Loudspeaker |
Sep. 19, 1989 |
| 4860370 |
Magnetically suspended acoustical speaker |
Aug. 22, 1989 |
| 4654486 |
Poor-scatter pot magnet system for magnetic-dynamic loudspeakers or acoustic transducers |
Mar. 31, 1987 |
| 4492827 |
Horn speaker with reduced magnetic flux leakage |
Jan. 8, 1985 |
| 4468530 |
Loudspeaker system |
Aug. 28, 1984 |
| 4465906 |
Low-leakage pot magnet system for moving-coil loudspeakers |
Aug. 14, 1984 |
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