СПИСОК патентов США - подгруппа МПК16 H04R3/08
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| № п/п | Номер патента | Название патента | |||
2017 | |||||
| 1 | 9571926 | High-efficiency low-voltage-power-supply high-power-output audio driver architecture | |||
2016 | |||||
| 2 | 9491551 | Network for bone conduction transducers | |||
| 3 | 9414151 | Speaker system | |||
| 4 | 9344822 | Estimating nonlinear distortion and parameter tuning for boosting sound | |||
| 5 | 9332347 | Control of a loudspeaker output | |||
| 6 | 9258664 | Headphone audio enhancement system | |||
| 7 | 9258659 | Method of detecting enclosure leakage of enclosure mounted loudspeakers | |||
2015 | |||||
| 8 | 9161140 | Medical device for lessening the effects of noise and interference from varying or alternating magnetic fields | |||
2003 | |||||
| 9 | 6639994 | Loudspeaker having adjustable motor strength | |||
1996 | |||||
| 10 | 5586191 | Adjustable filter for differential microphones | |||
| 11 | 5577126 | Overload protection circuit for transducers | |||
1994 | |||||
| 12 | 5303307 | Adjustable filter for differential microphones | |||
1992 | |||||
| 13 | 5129005 | Electrodynamic loudspeaker | |||
1988 | |||||
| 14 | 4720665 | Signal transducer | |||
1986 | |||||
| 15 | 4598178 | Means for critically damping a dynamic loudspeaker | |||
| 16 | 4566120 | Loudspeaker system and loudspeaker for use in a loud-speaker system for converting an n-bit digitized electric signal into an acoustic signal | |||
1985 | |||||
| 17 | 4504704 | Loudspeaker system | |||
1981 | |||||
| 18 | 4296444 | Inductive signal transducer supply circuit particularly for video recording use | |||
1979 | |||||
| 19 | 4151379 | Electromagnetic speaker with bucking parallel high and low frequency coils drives sounding board and second diaphragm or external apparatus via magnetic coupling and having adjustable air gap and slot pole piece | |||
1978 | |||||
| 20 | 4105945 | Active load circuits | |||
1976 | |||||
| 21 | 3988541 | Method and apparatus for frequency compensation of electro-mechanical transducer | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||