Electromagnetic (e.g., Dyynamic) Patents (Class 381/396)
- Multiple voice coils (Class 381/401)
- Centering from outside bobbin or diaphragm (Class 381/403)
- Centering from within bobbin or diaphragm (Class 381/405)
- Field coil (Class 381/406)
- Particular bobbin structure (Class 381/407)
- Pattern (Class 381/408)
- Wiring structure (Class 381/409)
- Coil coating, winding layer structure, or wire (Class 381/410)
- Having damping (Class 381/413)
- Flux modifying means (Class 381/414)
- Magnetic liquid (Class 381/415)
- Inverted (e.g., within cone) (Class 381/416)
- Armature diaphragm (Class 381/417)
- Armature linked to diaphragm (Class 381/418)
- Not having central magnetic portion (Class 381/419)
- Having central magnetic portion (Class 381/420)