| Patents for H04K 3 - Jamming of communication; Counter-measures (1,951) |
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| 12/30/1997 | US5703950 Method and apparatus for controlling country specific frequency allocation |
| 12/18/1997 | WO1997047987A1 Spoofing detection system for a satellite positioning system |
| 08/05/1997 | US5655019 Identity protection method for use with wireless telephone systems |
| 07/08/1997 | USRE35553 Optical RF stereo |
| 06/11/1997 | EP0778678A1 Differential receiver for direct sequence spread spectrum signals |
| 06/08/1997 | CA2192052A1 Differential receiver of direct sequence spread spectrum signals |
| 05/07/1997 | EP0772315A1 Method and apparatus for radio transmission protected against noise |
| 05/01/1997 | WO1997015986A1 A method for direct sequence spreading of a data sequence (dsss) |
| 05/01/1997 | CA2235737A1 A method for direct sequence spreading of a data sequence (dsss) |
| 03/25/1997 | US5615261 Method and apparatus for detecting illicit RF data transmissions |
| 12/31/1996 | US5589929 RF signal train generator and interferoceivers |
| 12/10/1996 | US5583509 Method of jamming a victim communications system |
| 09/17/1996 | US5557284 Spoofing detection system for a satellite positioning system |
| 09/03/1996 | US5553126 Secure anti-jamming wireless party line |
| 05/02/1996 | DE4413622A1 Radio reconnaissance system using frequency hopping |
| 02/27/1996 | US5495497 Method and apparatus for suppressing interference from bandspread communication signals |
| 02/27/1996 | US5495496 Method and apparatus for suppressing linear amplitude interference from bandspread communication signals |
| 12/27/1995 | EP0455699B1 Method and apparatus for preventing external detection of signal information |
| 12/05/1995 | US5473693 Apparatus for avoiding complementarity in an encryption algorithm |
| 08/30/1995 | EP0669059A1 Automatic gain control for reducing effects of jamming |
| 07/05/1995 | EP0660901A1 Remote vehicle access featuring high security |
| 06/28/1995 | EP0660563A1 Apparatus for implementing a symmetric block ciphering algorithm without the complementation property |
| 04/13/1995 | EP0669059A4 Automatic gain control for reducing effects of jamming. |
| 03/22/1995 | EP0644673A1 Direct sequence spread spectrum data transmission |
| 03/15/1995 | CN2192051Y Video frenquency radiation information interference unit for computer |
| 01/03/1995 | US5379445 For controlling the size of a null zone in a drive signal for amplifier |
| 11/22/1994 | US5367269 System for producing an oscillating jamming signal utilizing a phase-locked loop |
| 10/18/1994 | CA2033983C System and method for communications security protection |
| 10/11/1994 | US5355091 Apparatus for real time interference signal rejection |
| 09/27/1994 | US5351292 Method and apparatus for preventing external detection of signal information |
| 08/23/1994 | CA2023788C Anti-intrusion defeator and locator for communication satellites |
| 06/14/1994 | US5321747 Method and apparatus for preventing extraneous detection of signal information |
| 06/14/1994 | US5321405 Radio frequency energy jamming system |
| 06/07/1994 | US5319797 Remote vehicle access featuring high security |
| 05/17/1994 | US5313209 Sweep jammer identification process |
| 05/10/1994 | US5311596 Continuous authentication using an in-band or out-of-band side channel |
| 04/28/1994 | WO1994009571A1 Automatic gain control for reducing effects of jamming |
| 04/13/1994 | EP0591393A1 A method and an apparatus for preventing extraneous detection of signal information |
| 04/05/1994 | US5301166 Remote control command system |
| 03/31/1994 | WO1994006988A1 Remote vehicle access featuring high security |
| 03/29/1994 | US5299171 Torpedo decoy signal generator |
| 03/23/1994 | EP0588519A2 Continuous authentication using an in-band or out-of-band side channel |
| 03/15/1994 | US5294930 Optical RF stereo |
| 03/01/1994 | CA2104849A1 Continuous authentication using an in-band or out-of-band side channel |
| 02/08/1994 | US5285478 Communication system utilizing self-similar signals |
| 02/02/1994 | EP0424415B1 System for protecting digital equipment against remote access |
| 02/01/1994 | CA2030678C Real-time rejection circuit to automatically reject multiple interfering hopping signals while passing a lower level desired signal |
| 01/26/1994 | EP0580243A2 Narrow band interference frequency excision method and means for spread spectrum communication |
| 01/25/1994 | CA2100994A1 Narrow band interference frequency excision method and means |
| 01/20/1994 | DE3432648C1 Interference-resistant radio signal transmission procedure - using frequency exchange keying modulation in combination with pseudo-random carrier frequency hopping |
| 12/28/1993 | US5274836 Multiple encoded carrier data link |
| 11/16/1993 | US5263048 Narrow band interference frequency excision method and means |
| 11/09/1993 | US5260707 Phase coherent interference signal suppression system and method |
| 11/02/1993 | US5259030 Antijam improvement method and apparatus |
| 10/06/1993 | EP0563912A1 A protective device for computers and the like |
| 07/13/1993 | US5228082 Jamming signal producing system in CATV |
| 06/01/1993 | US5216713 Method and apparatus for preventing extraneous detection of signal information |
| 05/13/1993 | WO1993009618A1 Communication system utilizing self-similar signals |
| 04/29/1993 | CA2054340A1 Jog detector |
| 04/28/1993 | EP0539262A1 Device for improving the simultaneous operation of interfering transmitter-receivers and a frequency-agile transmitter receiver |
| 04/23/1993 | CA2081192A1 Device for improving the cohabitation of radio-electric transceivers with frequency hopping transceivers in the presence of jammers |
| 01/19/1993 | US5181243 System and method for communications security protection |
| 01/07/1993 | WO1993000757A1 A method and an apparatus for preventing extraneous detection of signal information |
| 12/29/1992 | US5175558 Nulling system for constraining pulse jammer duty factors |
| 12/08/1992 | US5170411 Modulation and demodulation system for spread spectrum transmission |
| 12/01/1992 | US5168508 Spread spectrum receiver |
| 11/24/1992 | US5166953 Technique for frequency-hopped spread spectrum communications |
| 11/17/1992 | US5165098 System for protecting digital equipment against remote access |
| 10/27/1992 | CA1309510C Carrier continuous film for heat fusible materials |
| 10/21/1992 | EP0509850A2 Cellular mobile communication system wherein service area is reduced in response to control signal contamination |
| 10/20/1992 | US5157725 Method and apparatus for preventing external detection of signal information |
| 10/20/1992 | US5157688 Spread spectrum transmitter for degrading spread spectrum feature detectors |
| 10/20/1992 | US5157401 Jog detector |
| 10/01/1992 | DE3612958A1 Noise signals generating for ECM system - has two different adjustable frequency components has common VCO, delay line and couplers |
| 09/15/1992 | US5148478 System and method for communications security protection |
| 09/02/1992 | EP0500767A1 Audio surveillance discouragement apparatus and method |
| 08/18/1992 | US5140694 Anti-intrusion defeator and locator for communication satellites |
| 07/28/1992 | US5134631 Digital gain controller |
| 07/15/1992 | EP0494346A2 Surveillance receiver and method for monitoring a frequency band |
| 06/30/1992 | US5127020 Bias control device |
| 06/16/1992 | US5122801 Monitoring systems |
| 05/20/1992 | EP0486368A1 Procedure and device for jamming protection of microwave links |
| 05/12/1992 | US5113438 Method and apparatus for jamming infrared remote controls |
| 05/05/1992 | CA1300234C Process and apparatus for the transmission of selective addresses and/or emergency messages in shortwave radio networks |
| 04/22/1992 | EP0481961A2 RF-communication system with a unit for preventing an interception of a radio communication signal transmitted between a fixed facility and a mobile station |
| 04/15/1992 | EP0280718B1 Hidden preamble for frequency hopped synchronization |
| 03/18/1992 | EP0474925A1 Holographic communications device and method |
| 03/18/1992 | EP0474667A1 Dummy traffic generation |
| 03/12/1992 | DE4028602A1 Identifying hopping radio transmissions - testing on basis of previously used frequencies in search receiver by time filter function for coincidence |
| 03/10/1992 | CA1297160C Communications jammer |
| 02/13/1992 | DE4024944A1 Preventing triggering of explosive by armoured vehicle - using radiation reflecting and emitting system |
| 02/04/1992 | US5086467 Dummy traffic generation |
| 11/05/1991 | US5063572 Channelized delay and mix chip rate detector |
| 07/30/1991 | US5036542 Audio surveillance discouragement apparatus and method |
| 07/09/1991 | US5031192 Synthetic demodulation of spread spectrum signals |
| 07/02/1991 | US5029184 Low probability of intercept communication system |
| 05/16/1991 | WO1991007066A1 Audio surveillance discouragement apparatus and method |
| 05/14/1991 | US5016261 Method and apparatus for achieving improved anti-jam performance via conversion gain |
| 05/08/1991 | EP0425660A1 System and method for communications security protection |
| 05/08/1991 | DE3936658A1 TV cable signal distortion method - is provided by superimposing noise signals at receiver |