СПИСОК патентов США - подгруппа МПК16 H04R19/04
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№ п/п | Номер патента | Название патента | |||
2017 | |||||
1 | 9609764 | Image display apparatus | |||
2 | 9609432 | Microphone with automatic bias control | |||
3 | 9609429 | Microphone | |||
4 | 9602930 | Dual diaphragm microphone | |||
5 | 9602924 | Microphone with programmable frequency response | |||
6 | 9602921 | Independently charge pumps for differential microphone | |||
7 | 9599648 | Capacitive sensor | |||
8 | 9596995 | Pressure sensor, acoustic microphone, blood pressure sensor, and touch panel | |||
9 | 9596547 | MEMS microphone with spring suspended backplate | |||
10 | 9591408 | Adjustable ventilation openings in MEMS structures | |||
11 | 9590570 | Impedance converter circuit for condenser microphone | |||
12 | 9584931 | Middle ear implantable microphone | |||
13 | 9584924 | Unidirectional condenser microphone and method of manufacturing the same | |||
14 | 9584903 | MEMS device and process | |||
15 | 9580299 | MEMS device and method of making a MEMS device | |||
16 | 9578423 | Electronic device and sound capturing method | |||
17 | 9571938 | Microphone element and device for detecting acoustic and ultrasound signals | |||
18 | 9571931 | Systems and methods for reducing non-linearities of a microphone signal | |||
19 | 9565488 | Micro-electro-mechanical system devices | |||
20 | 9560459 | Modular voice amplification system for protective mask | |||
21 | 9560455 | Offset calibration in a multiple membrane microphone | |||
22 | 9560454 | Acoustic transducer | |||
23 | 9559647 | Amplifier circuit | |||
24 | 9554213 | Hinged MEMS diaphragm | |||
25 | 9554212 | Capacitive microphone with integrated cavity | |||
26 | 9549261 | Microphone package | |||
27 | 9549236 | Condenser microphone capsule backplate | |||
28 | 9548655 | Differential dynamic charge pump circuit | |||
29 | 9544697 | Acoustic transducer and microphone | |||
30 | 9544678 | Printed circuit board with an acoustic channel for a microphone | |||
31 | 9544673 | Microphone with built-in speaker driver | |||
32 | 9544672 | Condenser microphone | |||
33 | 9538283 | Ear microphone | |||
34 | 9538273 | Microphone device including light emitting elements | |||
35 | 9538271 | Electronic apparatus having microphone | |||
2016 | |||||
36 | 9530407 | Spatial audio database based noise discrimination | |||
37 | 9525925 | Sensor with movable part and biasing | |||
38 | 9521491 | Capacitive sensor, acoustic sensor and microphone | |||
39 | 9516427 | Electrode extraction terminal for unidirectional condenser microphone unit and unidirectional condenser microphone unit | |||
40 | 9516424 | Micromechanical sensor system combination and a corresponding manufacturing method | |||
41 | 9510117 | Device for measuring sound level | |||
42 | 9510109 | MEMS microphone device | |||
43 | 9510108 | Circuit module for silicon condenser microphone | |||
44 | 9510107 | Double diaphragm MEMS microphone without a backplate element | |||
45 | 9503821 | Electrostatic transducer | |||
46 | 9503820 | Multi-mode microphones | |||
47 | 9503814 | Differential outputs in multiple motor MEMS devices | |||
48 | 9502206 | Corrosion-resistant, strong x-ray window | |||
49 | 9497529 | Microphone port with foreign material ingress protection | |||
50 | 9493338 | Capacitance type sensor and method of manufacturing the same | |||
51 | 9491539 | MEMS apparatus disposed on assembly lid | |||
52 | 9491531 | Microphone device for reducing noise coupling effect | |||
53 | 9488541 | Pressure sensor, microphone, and acoustic processing system | |||
54 | 9485560 | Embedded circuit in a MEMS device | |||
55 | 9479875 | Multi-mode microphones | |||
56 | 9469176 | System and method to detect an unattended occupant in a vehicle and take safety countermeasures | |||
57 | 9467785 | MEMS apparatus with increased back volume | |||
58 | 9467774 | System and method for a PCM interface for a capacitive signal source | |||
59 | 9466277 | Adjustable directivity acoustic pickup for musical instruments | |||
60 | 9462402 | Monolithic complementary metal-oxide semiconductor (CMOS)-integrated silicon microphone | |||
61 | 9462395 | Biasing circuit for a MEMS acoustic transducer with reduced start-up time | |||
62 | 9462389 | Anti-impact silicon based MEMS microphone, a system and a package with the same | |||
63 | 9462372 | Unidirectional condenser microphone unit | |||
64 | 9462364 | Capacitance type sensor, acoustic sensor, and microphone | |||
65 | 9456284 | Dual-element MEMS microphone for mechanical vibration noise cancellation | |||
66 | 9455671 | System and method for capacitive signal source amplifier | |||
67 | 9451366 | Component having a micromechanical microphone pattern | |||
68 | 9445188 | Condenser microphone | |||
69 | 9438979 | MEMS sensor structure for sensing pressure waves and a change in ambient pressure | |||
70 | 9438978 | Microphone | |||
71 | 9438972 | Silicon based MEMS microphone, a system and a package with the same | |||
72 | 9432776 | Condenser microphone | |||
73 | 9432765 | Condenser microphone | |||
74 | 9428380 | Shielded encapsulating structure and manufacturing method thereof | |||
75 | 9420365 | Silicon condenser microphone | |||
76 | 9414175 | Microphone test procedure | |||
77 | 9414165 | Acoustic sensor resonant peak reduction | |||
78 | 9409763 | MEMS device and method of making a MEMS device | |||
79 | 9407997 | Microphone package with embedded ASIC | |||
80 | 9407991 | Systems and methods for using a speaker as a microphone in a mobile device | |||
81 | 9402138 | MEMS device and method of manufacturing a MEMS device | |||
82 | 9392376 | Microphone on printed circuit board (PCB) | |||
83 | 9392359 | Variable directivity electret condenser microphone | |||
84 | 9386380 | Method for the integration of a microelectromechanical systems (MEMS) microphone device with a complementary metal-oxide-semiconductor (CMOS) device | |||
85 | 9383268 | Strain sensor, pressure sensor, microphone, blood pressure sensor, personal digital assistant, and hearing aid | |||
86 | 9382109 | MEMS microphone with reduced parasitic capacitance | |||
87 | 9380393 | Capacitance sensor, acoustic sensor, and microphone | |||
88 | 9374644 | Acoustic transducer and microphone | |||
89 | 9374643 | Embedded dielectric as a barrier in an acoustic device and method of manufacture | |||
90 | 9369811 | Condenser microphone | |||
91 | 9369808 | Acoustic transducer with high sensitivity | |||
92 | 9369804 | MEMS membrane overtravel stop | |||
93 | 9363617 | Semiconductor device having a base, a cavity, a diaphragm, and a substrate | |||
94 | 9363610 | MEMS process and device | |||
95 | 9363608 | Acoustic transducer | |||
96 | 9357313 | Microphone unit having a plurality of diaphragms and a signal processing unit | |||
97 | 9357296 | Switchable attenuation circuit for MEMS microphone systems | |||
98 | 9357294 | Microphone arrangement | |||
99 | 9351084 | Packaging concept to improve performance of a micro-electro mechanical (MEMS) microphone | |||
100 | 9351062 | Microphone unit | |||
101 | 9344810 | Condenser microphone | |||
102 | 9344808 | Differential sensing acoustic sensor | |||
103 | 9344807 | Capacitance-type transducer, acoustic sensor, and microphone | |||
104 | 9344806 | Component having a micro-mechanical microphone structure and method for producing the component | |||
105 | 9342179 | Strain sensing element, pressure sensor, microphone, blood pressure sensor, and touch panel | |||
106 | 9340413 | Integrated acoustic transducer in MEMS technology, and manufacturing process thereof | |||
107 | 9338560 | Top port multi-part surface mount silicon condenser microphone | |||
108 | 9338559 | Microphone system with a stop member | |||
109 | 9338546 | Circuit assembly for processing an input signal, microphone assembly and method for following an input signal | |||
110 | 9338538 | Multi-microphone system | |||
111 | 9332354 | Micromechanical detection structure for a MEMS acoustic transducer and corresponding manufacturing process | |||
112 | 9332345 | Use of microphone capacitance as a switched capacitor in an input network of a delta-sigma modulator | |||
113 | 9326081 | Microphone, acoustic sensor, and method of manufacturing acoustic sensor | |||
114 | 9326079 | Detection circuit | |||
115 | 9319799 | Microphone package with integrated substrate | |||
116 | 9319798 | Capacitive transducer | |||
117 | 9319772 | Multi-floor type MEMS microphone | |||
118 | 9307328 | Interposer for MEMS-on-lid microphone | |||
119 | 9301075 | MEMS microphone with out-gassing openings and method of manufacturing the same | |||
120 | 9299671 | Integrated CMOS back cavity acoustic transducer and the method of producing the same | |||
121 | 9294829 | Wind noise reduction filter | |||
122 | 9288572 | Haptic microphone | |||
123 | 9287834 | Read-out for MEMS capacitive transducers | |||
124 | 9277328 | Condenser microphone | |||
125 | 9277039 | Headset and headphone | |||
126 | 9275626 | Audio system | |||
127 | 9271435 | Miniature microphone, protection frame thereof and method for manufacturing the same | |||
128 | 9271087 | Microelectro-mechanical systems (MEMS) microphone package device and MEMS packaging method thereof | |||
129 | 9270238 | Digital condenser microphone having preamplifier with variable input impedance and method of controlling variable input impedance of preamplifier | |||
130 | 9264833 | Structure and method for integrated microphone | |||
131 | 9264816 | Volume reduction filling member for microphone and unidirectional condenser microphone incorporating the same | |||
132 | 9264815 | Silicon condenser microphone | |||
133 | 9264814 | Microphone | |||
134 | 9260292 | Sensor device | |||
135 | 9258662 | Condenser microphone and manufacturing method thereof | |||
136 | 9258652 | Microphone structure | |||
137 | 9250142 | Pressure sensor, microphone, blood pressure sensor, and touch panel | |||
138 | 9237402 | Integrated CMOS/MEMS microphone die | |||
2015 | |||||
139 | 9226079 | Microelectromechanical sensing structure for a capacitive acoustic transducer including an element limiting the oscillations of a membrane, and manufacturing method thereof | |||
140 | 9226052 | Microphone system with non-orthogonally mounted microphone die | |||
141 | 9219963 | Dual single-crystal backplate microphone system and method of fabricating same | |||
142 | 9216897 | Capacitive sensing structure with embedded acoustic channels | |||
143 | 9215532 | Systems and methods for using a speaker as a microphone in a mobile device | |||
144 | 9212046 | MEMS microphone with membrane antennas | |||
145 | 9210516 | Packaged MEMS device and method of calibrating a packaged MEMS device | |||
146 | 9197967 | Microphone and method to position a membrane between two backplates | |||
147 | 9181086 | Hinged MEMS diaphragm and method of manufacture therof | |||
148 | 9179221 | MEMS devices, interface circuits, and methods of making thereof | |||
149 | 9173024 | Noise mitigating microphone system | |||
150 | 9173015 | Microphone module with sound pipe | |||
151 | 9167354 | Electroacoustic sound transducer | |||
152 | 9162873 | Component and method for producing same | |||
153 | 9161125 | High dynamic microphone system | |||
154 | 9161112 | Single-wire programmable MEMS microphone, programming method and system thereof | |||
155 | 9156684 | Methods of manufacture of top port surface mount MEMS microphones | |||
156 | 9156675 | Micromechanical component and manufacturing method for a micromechanical component | |||
157 | 9154886 | Capacitive transducer manufacturing method, and multi-function device | |||
158 | 9154871 | Condenser microphone | |||
159 | 9150409 | Methods of manufacture of bottom port surface mount MEMS microphones | |||
160 | 9150403 | MEMS microphone device and method for making same | |||
161 | 9148731 | Top port surface mount MEMS microphone | |||
162 | 9143870 | Microphone system with mechanically-coupled diaphragms | |||
163 | 9143849 | Sensor module | |||
164 | 9139422 | Bottom port surface mount MEMS microphone | |||
165 | 9139421 | Top port surface mount MEMS microphone | |||
166 | 9137606 | Electrostatic electroacoustic transducer and method of manufacturing the same | |||
167 | 9137595 | Apparatus for prevention of pressure transients in microphones | |||
168 | 9133020 | Methods of manufacture of bottom port surface mount MEMS microphones | |||
169 | 9133016 | MEMS microphone and method for manufacture | |||
170 | 9131319 | Component having a micromechanical microphone structure | |||
171 | 9131315 | MEMS microphone with a built-in textile material protecting screen | |||
172 | 9124967 | Microphone systems for base drums and other instruments | |||
173 | 9118994 | Capacitance sensor, acoustic sensor, and microphone | |||
174 | 9113263 | VAD detection microphone and method of operating the same | |||
175 | 9113261 | Unidirectional condenser microphone and method for adjusting acoustic resistance | |||
176 | 9113249 | Robust diaphragm for an acoustic device | |||
177 | 9113116 | Video monitor attachment for a microphone | |||
178 | 9111548 | Synchronization of buffered data in multiple microphones | |||
179 | 9107009 | Silicon condenser microphone | |||
180 | 9107008 | Microphone with adjustable characteristics | |||
181 | 9107007 | Microphone unit | |||
182 | 9100741 | Microphone | |||
183 | 9099569 | MEMS microphone | |||
184 | 9096424 | Assembly of a capacitive acoustic transducer of the microelectromechanical type and package thereof | |||
185 | 9096423 | Methods of manufacture of top port multi-part surface mount MEMS microphones | |||
186 | 9079760 | Integrated microphone package | |||
187 | 9078069 | MEMS microphone with springs and interior support | |||
188 | 9078068 | Microphone with aligned apertures | |||
189 | 9067780 | Methods of manufacture of top port surface mount MEMS microphones | |||
190 | 9066184 | Acoustic sensor and fabrication method thereof | |||
191 | 9066180 | Component having a micromechanical microphone structure | |||
192 | 9061893 | Methods of manufacture of top port multi-part surface mount silicon condenser microphones | |||
193 | 9061889 | MEMS microphone | |||
194 | 9060227 | Shielded encapsulating structure and manufacturing method thereof | |||
195 | 9059630 | High voltage multiplier for a microphone and method of manufacture | |||
196 | 9056760 | Miniaturized electrical component comprising an MEMS and an ASIC and production method | |||
197 | 9051171 | Bottom port surface mount MEMS microphone | |||
198 | 9014394 | Systems and methods for retaining a microphone | |||
199 | 8989420 | Throwable wireless microphone system for passing from one user to the next in lecture rooms and auditoriums | |||
200 | 8965001 | Mic rubber apparatus for portable electric device | |||
201 | 8958578 | Throat vibration audio wireless transmission apparatus | |||
202 | 8948439 | Acoustic conversion device and acoustic conversion device assembly method | |||
203 | 8948433 | Narrow-angle directional microphone | |||
204 | 8942389 | Trim method for CMOS-MEMS microphones | |||
2014 | |||||
205 | 8917897 | Microphone | |||
206 | 8902604 | Component support and assembly having a MEMS component on such a component support | |||
207 | 8867772 | Condenser microphone unit and condenser microphone | |||
208 | 8848962 | Unidirective condenser microphone unit and condenser microphone | |||
209 | 8842858 | Electret condenser microphone | |||
210 | 8837754 | Microelectromechanical transducer and corresponding assembly process | |||
211 | 8818010 | Microphone unit | |||
212 | 8810724 | Image-pickup apparatus | |||
213 | 8798992 | Audio noise modification for event broadcasting | |||
214 | 8767993 | Housing for microphone arrays and multi-sensor devices for their size optimization | |||
215 | 8737661 | Narrow directional condenser microphone | |||
216 | 8644545 | Condenser microphone unit and condenser microphone | |||
217 | 8644533 | Method and apparatus for hearing assistance device microphones | |||
2013 | |||||
218 | 8620014 | Microphone | |||
219 | 8582795 | Robust diaphragm for an acoustic device | |||
220 | 8565452 | Integrated acoustic transducer in MEMS technology, and manufacturing process thereof | |||
221 | 8559664 | Microphone unit | |||
222 | 8488829 | Paired gradient and pressure microphones for rejecting wind and ambient noise | |||
223 | 8488827 | Condenser microphone | |||
224 | 8483776 | Acoustic path for a wireless communications device | |||
225 | 8483412 | Variable pattern hanging microphone system with remote polar control | |||
226 | 8477969 | Condenser microphone | |||
227 | 8467548 | Miniature micro-electromechanical system (MEMS) based directional sound sensor | |||
228 | 8442243 | Ribbon microphone | |||
229 | 8374364 | Acoustic sensor and method of manufacturing the same | |||
230 | 8369556 | Microphone pop filter | |||
231 | 8351633 | Noise cancelling microphone with wind shield | |||
2012 | |||||
232 | 8325954 | Processing an input signal in a hearing aid | |||
233 | 8315418 | Sound receiver | |||
234 | 8290184 | MEMS microphone | |||
235 | 8280092 | Voice sound input apparatus | |||
236 | 8280080 | Microcap acoustic transducer device | |||
237 | 8254618 | Microphone | |||
238 | 8229153 | Microphone packaging in a mobile communications device | |||
239 | 8224012 | Vehicle accessory microphone | |||
240 | 8218807 | Portable microphone extender and associated method | |||
241 | 8208671 | Microphone with backside cavity that impedes bubble formation | |||
242 | 8199961 | Speaker device, installation body for speaker device, and mobile body having speaker device mounted thereon | |||
243 | 8175314 | Tactical microphone support systems | |||
244 | 8175313 | Electronic anti-sabotage microphone grommet | |||
245 | 8170260 | System for determining the position of sound sources | |||
246 | 8155345 | Wearable terminal, mobile imaging sound collecting device, and device, method, and program for implementing them | |||
247 | 8150086 | Voice sound input apparatus and voice sound conference system | |||
248 | 8094857 | Sing-along stand with performance interface configured to display a music storage/playback device | |||
249 | 8089828 | Acoustic sensor element | |||
2011 | |||||
250 | 8081789 | Microphone holder and microphone device using same | |||
251 | 8077899 | Electronic device and process for mounting microphone therein | |||
252 | 8068632 | Microphone and microphone hanger-hook | |||
253 | 8055005 | Bluetooth earphone and lanyard structure thereof | |||
254 | 8050443 | Microphone and microphone mounting structure | |||
255 | 8039911 | MEMS sensor | |||
256 | 8019109 | Microphone boom with adjustable wind noise suppression | |||
257 | 8019101 | Condenser microphone | |||
258 | 8014546 | EMI shielding for a microphone | |||
259 | 8005207 | Microphone coupler system for a communication device | |||
260 | 7978869 | Wireless microphone | |||
261 | 7974430 | Microphone with dust-proof section | |||
262 | 7974429 | Wireless microphone | |||
263 | 7945062 | Microelectromechanical microphone packaging system | |||
264 | 7941909 | Method of fabricating an ultra-small condenser microphone | |||
265 | 7933428 | Microphone apparatus | |||
266 | 7916879 | Electrostatic acoustic transducer based on rolling contact micro actuator | |||
267 | 7881484 | Capacitor microphone | |||
2010 | |||||
268 | 7844069 | Microphone mounting system for acoustic stringed instruments | |||
269 | 7801316 | Capacitor microphone | |||
270 | 7729500 | Microphone array with electromagnetic interference shielding means | |||
271 | 7720239 | Capacitor microphone with acoustic resistor | |||
2009 | |||||
272 | 7630506 | Condenser microphone unit | |||
273 | 7609843 | Sound collector | |||
274 | 7602931 | Gasket for reducing electromagnetic interference in a boundary microphone | |||
275 | 7583810 | Fixing unit for microphone | |||
276 | 7580533 | Particulate flow detection microphone | |||
277 | 7561705 | Reduction of flux leakage in a dynamic microphone | |||
278 | 7555118 | Microphone coupler for a communication device | |||
279 | 7493899 | Microphone adaptor for a respirator | |||
2008 | |||||
280 | 7447326 | Condenser microphone | |||
281 | 7400737 | Miniature condenser microphone and fabrication method therefor | |||
2007 | |||||
282 | 7302073 | Method of detecting and deterring microphone sabotage | |||
283 | 7295675 | Phantom powered capacitor microphone and a method of using a vacuum tube in the same | |||
2005 | |||||
284 | 6961437 | Capacitor microphone | |||
285 | 6947568 | Condenser microphone | |||
286 | 6943448 | Multi-metal layer MEMS structure and process for making the same | |||
287 | 6940564 | Display substrate and display device | |||
288 | 6928173 | Capacitor microphone | |||
289 | 6901804 | Method of manufacturing a membrane sensor | |||
290 | 6898294 | Microphone set | |||
291 | 6859542 | Method of providing a hydrophobic layer and a condenser microphone having such a layer | |||
292 | 6847090 | Silicon capacitive microphone | |||
293 | 6845167 | Contacting arrangement for an electroacoustic microphone transducer | |||
2004 | |||||
294 | 6792123 | Electroacoustic transducer | |||
295 | 6788795 | Micromachined capacitive component with high stability | |||
296 | 6753583 | Electrostatic electroacoustical transducer | |||
297 | 6748091 | Capacitor microphone and portable telephone using the capacitor microphone | |||
298 | 6721429 | Electro-magnetic microphone | |||
299 | 6708387 | Method for manufacturing condenser microphones | |||
300 | 6694032 | Electret condenser microphone | |||
301 | 6677176 | Method of manufacturing an integrated electronic microphone having a floating gate electrode | |||
2003 | |||||
302 | 6654473 | Condenser microphone | |||
303 | 6552469 | Solid state transducer for converting between an electrical signal and sound | |||
304 | 6522762 | Silicon-based sensor system | |||
2002 | |||||
305 | 6389902 | Micromechanical sensor and method for its production | |||
2001 | |||||
306 | 6249586 | Slot microphone | |||
2000 | |||||
307 | 6111966 | Capacitor microphone | |||
308 | 6084972 | Integrated microphone/amplifier unit, and amplifier module therefor | |||
1999 | |||||
309 | 5862239 | Directional capacitor microphone system | |||
1998 | |||||
310 | 5809155 | Assembling structure for capacitor microphone | |||
311 | 5802198 | Hermetically sealed condenser microphone | |||
1996 | |||||
312 | 5573679 | Fabrication of a surface micromachined capacitive microphone using a dry-etch process | |||
313 | 5539834 | Baffled microphone assembly | |||
314 | 5511130 | Single diaphragm second order differential microphone assembly | |||
1995 | |||||
315 | 5452268 | Acoustic transducer with improved low frequency response | |||
316 | 5408534 | Electret microphone assembly, and method of manufacturer | |||
1994 | |||||
317 | 5363452 | Microphone for use in a vibrating environment | |||
1993 | |||||
318 | 5233667 | Camcorder with a microphone | |||
1992 | |||||
319 | 5136656 | Probe microphone | |||
1988 | |||||
320 | 4757545 | Amplifier circuit for a condenser microphone system | |||
1987 | |||||
321 | 4648480 | Condenser microphone having resistance against high-temperature and radioactive rays | |||
1986 | |||||
322 | 4610062 | Method of making an acoustic microphone | |||
1985 | |||||
323 | 4541112 | Electroacoustic transducer system | |||
324 | 4539441 | Hearing-aid with integrated circuit electronics | |||
325 | 4516428 | Acceleration vibration detector | |||
326 | 4495385 | Acoustic microphone | |||
1984 | |||||
327 | 4489278 | Electrostatic voltage detecting device | |||
328 | 4467394 | Three plate silicon-glass-silicon capacitive pressure transducer | |||
329 | 4449236 | Anti-side tone transmitter | |||
1983 | |||||
330 | 4414433 | Microphone output transmission circuit | |||
331 | 4392025 | Condenser microphone | |||
332 | 4380041 | Capacitor pressure transducer with housing | |||
1982 | |||||
333 | 4329547 | Dual section electret microphone | |||
334 | 4321432 | Electrostatic microphone | |||
1981 | |||||
335 | 4301492 | Pressure-sensing transducer | |||
336 | 4292659 | Pressure sensing capacitive transducer | |||
337 | 4287553 | Capacitive pressure transducer | |||
338 | 4281221 | Condenser microphone | |||
339 | 4258235 | Pressure gradient electret microphone | |||
1979 | |||||
340 | 4170721 | Microphone with molded block amplifier electrostatic | |||
341 | 4151378 | Electrostatic microphone with damping to improve omnidirectionality, flatten frequency response, reduce wind noise | |||
1977 | |||||
342 | 4037062 | Liquid crystal electromechanical transducer | |||
343 | 4025734 | Ambient noise shielded ear transceiver | |||
1976 | |||||
344 | 3991285 | Microphone having an electrostatic cartridge having a structural electrical resistor | |||
345 | 3963881 | Unidirectional condenser microphone | |||
346 | 3961202 | Power supply circuit for use with an electrostatic transducer | |||
347 | 3944756 | Electret microphone | |||
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 |