| Patents for H04B 15 - Suppression or limitation of noise or interference (10,227) |
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| 10/23/1991 | EP0452992A2 Electric noise absorber |
| 10/17/1991 | WO1991015925A1 Transmission and reception in a hostile interference environment |
| 10/16/1991 | CN1055456A Electromagnetic shield for electrical circuit |
| 10/16/1991 | CN1014386B High-frequency high-intensity electromagnetic field signal anti-interference circuit of telephone set |
| 10/15/1991 | US5058172 Electromagnetic interference suppressant assembly |
| 10/09/1991 | EP0276277B1 Data communications system having noise reduction means |
| 10/09/1991 | EP0224556B1 Ensemble modem structure for imperfect transmission media |
| 10/08/1991 | US5055635 Arrangement for improving electromagnetic compatability of electrical device |
| 10/01/1991 | WO1991015939A1 Electromagnetic shield for electrical circuit |
| 10/01/1991 | US5053924 Electromagnetic shield for electrical circuit |
| 10/01/1991 | CA2078445A1 Method and apparatus for transmitting and receiving ofdm carriers |
| 09/10/1991 | US5048015 Interference source identification |
| 09/05/1991 | WO1991013430A1 Method for spectral estimation to improve noise robustness for speech recognition |
| 09/05/1991 | CA2051386A1 Method for spectral estimation to improve noise robustness for speech recognition |
| 09/04/1991 | EP0444569A1 Device for protection against transients on the DC-voltage generated by the connection or disconnection of an electronic assembly to the supply source |
| 09/03/1991 | WO1991013370A1 Time domain radio transmission system |
| 09/03/1991 | US5045653 Distribution for internal combustion engine |
| 08/29/1991 | CA2037125A1 Electronic assembly protection device against disturbance caused by the connextion to a continuous electric power source or the disconnection fom the said source |
| 08/28/1991 | EP0443778A2 A communications transmission system including facilities for suppressing electromagnetic interference |
| 08/22/1991 | DE4005129A1 High-frequency induction heater - has ferrite annular core and winding which produces eddy currents at frequency of power-MOSFET switched resonant DC-AC converter |
| 08/14/1991 | CN2082929U High-frequency signal distributor for preventing radiation from leaking out |
| 08/08/1991 | DE4003301A1 Suppression of electromagnetic interference - using chopper amplifier with integrated intermodulation suppression |
| 08/08/1991 | DE4003069A1 Video connector - has BNL bush mounted on plate with housing contacts to ground plug input |
| 07/25/1991 | DE4039413A1 Radiotelephone earthing strip with row of projecting tabs - pressed into contact with PCB after stamping at bent-over edge of metallic strip |
| 06/20/1991 | DE4039874A1 Line filter for damping symmetrical interference - reduces interference on mains supply lines by using specified series inductors and shunt capacitors across current, neutral and earth lines |
| 06/13/1991 | DE3940859A1 Active loudspeaker cabinet lined with metallic screening material - to which connections are made from mains interference suppression filter and casing of tweeter |
| 06/12/1991 | EP0431341A2 Interfering signal rejection circuitry for electronic article surveillance system and method employing same |
| 05/29/1991 | EP0428774A1 Microcomputer with an integrated RC oscillator having programmable frequencies |
| 05/14/1991 | US5016261 Method and apparatus for achieving improved anti-jam performance via conversion gain |
| 05/07/1991 | US5014351 Method and apparatus for reducing alternator noise |
| 05/07/1991 | US5014026 Suppressing radio-frequency interferences |
| 04/11/1991 | DE3932846A1 Radio interference filter - has symmetrical conductor system with centre strip and side branches embedded in resinous material which absorbs HF energy |
| 04/03/1991 | EP0420504A2 Radio housing |
| 03/21/1991 | DE3930068A1 Audio information transmission system - has noise suppression stage at loudspeaker end for eliminating switching noise |
| 03/20/1991 | EP0418149A2 Microcomputer controlled synthesizer-type radio receiver |
| 03/19/1991 | US5001773 Local oscillator feedthru cancellation circuit |
| 03/13/1991 | EP0416423A2 An arrangement for the attenuation of radiofrequency interferences caused by the harmonics of the clock frequency of digital devices |
| 02/12/1991 | US4992060 Apparataus and method for reducing radio frequency noise |
| 02/06/1991 | EP0411360A1 Method and apparatus for interference suppression in speech signals |
| 01/30/1991 | EP0309451B1 Device to protect against interference signals |
| 01/30/1991 | CN1011461B Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048776A Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048775A Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048774A Ensemble modem structure for imperfect transmission media |
| 01/17/1991 | DE3922398A1 Connected cable with integrated inductance - fitted in mains supply plug for suppression of interference to appts. connected telecommunications |
| 01/09/1991 | EP0398929A4 Radio frequency suppression for fuel pump |
| 01/08/1991 | US4984248 High speed transceiver |
| 01/08/1991 | US4983932 Electric noise absorber |
| 01/02/1991 | EP0406118A2 Apparatus and method for reducing radio frequency noise |
| 12/28/1990 | CA2020000A1 Apparatus and method for reducing radio frequency noise |
| 12/11/1990 | US4977340 Device for protecting an electrical circuit against interference pulses |
| 12/04/1990 | US4975681 Interfering signal rejection circuitry and electronic article surveillance system and method employing same |
| 11/29/1990 | WO1990014710A1 Modulated clock source for logic circuits |
| 11/28/1990 | EP0398929A1 Radio frequency suppression for fuel pump. |
| 11/28/1990 | EP0398908A1 Electronic appliance. |
| 11/20/1990 | US4972459 Arc-preventing high voltage cable for an x-radiator |
| 11/20/1990 | US4972167 Electric noise absorber |
| 11/13/1990 | US4970476 Electric noise absorber using a granular or liquid magnetic substance |
| 11/08/1990 | DE4013096A1 Suppressor plug for vehicle distributors - has capacitor elements that latch into plug body and contact conductors |
| 11/08/1990 | DE4007982A1 Audio reproduction system for several audio signal sources - has tuner, signal, converter, clock pulses generator and digital signal processor |
| 11/07/1990 | EP0396516A1 Filter device for suppressing radio-frequency interferences on transmission lines |
| 10/30/1990 | US4967316 Electric circuit unit |
| 10/24/1990 | EP0393542A2 Method and apparatus for achieving improved anti-jam performance via conversion gain |
| 10/23/1990 | CA1275440C Rfi suppression technique for switching circuits |
| 10/17/1990 | CN1046251A Method and apparatus for reducing noise on signal encodable on plurality of predetermined levels |
| 10/16/1990 | US4964013 Electric noise absorber |
| 10/16/1990 | US4964012 Electric noise absorber |
| 10/10/1990 | CN1009980B Static transducer containing filter against high-frequency interference |
| 10/03/1990 | EP0390645A1 Method of/and device for noise reduction on a codable multi-predetermined level signal |
| 10/02/1990 | CA1274890A2 Security control system |
| 09/28/1990 | CA2012687A1 Method and device for reducing noise in a multiple preset levels codable signal |
| 09/20/1990 | WO1990010980A1 Time domain radio transmission system |
| 09/20/1990 | DE3908902A1 Device for suppressing line-conducted noise signals in an electronic module |
| 09/12/1990 | EP0387108A1 Eliminating the effects of voltage transients |
| 09/05/1990 | EP0385258A2 Circuitry cancelling potential differences and for signal linearisation |
| 08/30/1990 | DE4003708A1 Ground line impedance elimination circuit - has cable of lower specific resistance than signal lines |
| 08/08/1990 | EP0380563A1 Improved noise suppression system |
| 08/02/1990 | DE3925684A1 Suppressor of interference from mains-powered TV receiver - comprises boxed intermediate three-pin socket around which lead from additionally earthed mains plugs is wound |
| 07/31/1990 | US4945322 Noise filter |
| 07/18/1990 | CN1008869B Anti-interference method for mirrior frequency by mirrior-frequency rejector |
| 07/12/1990 | DE3941915A1 Suppressor for electronic equipment electromagnetic interference - uses magnetic material ring located or connecting cable to unit |
| 07/04/1990 | EP0375926A2 Noise-suppressing shielding, in particular for an ignition distributor cap |
| 06/06/1990 | EP0243403B1 Rfi suppression technique for switching circuits |
| 05/31/1990 | DE3839929A1 EMC connection unit |
| 05/03/1990 | DE3836774A1 Arrangement for compensating for an electrical noise voltage induced in a communication line by an electrical noise source |
| 04/24/1990 | CA1268226A1 System for maintaining low bit error rate in a star- coupled network of direct coupled stations |
| 04/17/1990 | US4918591 High frequency interference suppression filter for circuits to be connected to a conductor |
| 04/05/1990 | DE3833235A1 Apparatus insert for telecommunications |
| 03/08/1990 | WO1990002477A1 Apparatus and method for protecting engine electronics from radio frequency interference |
| 03/07/1990 | CN1040295A Technique for reducing distortion characteristics in fiber-optic links |
| 02/20/1990 | US4903006 Power line communication system |
| 02/07/1990 | EP0353835A2 Technique for reducing distortion characteristics in fiber-optic links |
| 01/31/1990 | CN1006673B Omnidirectional self-adapting array signal processor |
| 01/30/1990 | CA1265201A1 Radio communications system with reduced d/u ratio variations |
| 01/25/1990 | WO1990000839A1 Process and device for suppressing interferences by microprocessor circuits |
| 01/11/1990 | DE3823018A1 Verfahren und vorrichtung zum entstoeren von mikroprozessor-schaltungen Method and apparatus for suppressing of microprocessor circuits |
| 01/09/1990 | US4893300 Technique for reducing distortion characteristics in fiber-optic links |
| 12/27/1989 | EP0347761A2 Local oscillator feedthru cancellation circuit and method therefor |
| 12/27/1989 | CN1038384A High-frequency high-intensity electromagnetic field signal anti-interference circuit of telephone set |
| 12/26/1989 | US4889958 Building with electromagnetic shield structure for individual floors |