| Patents for H04B 11 - Transmission systems employing ultrasonic, sonic or infrasonic waves (1,545) |
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| 03/10/2005 | US20050053122 Signalling system |
| 03/09/2005 | CN1591389A Method and apparatus for computer communication using audio signals |
| 03/03/2005 | US20050049732 Method and apparatus for computer communication using audio signals |
| 02/22/2005 | US6859419 Laser-based acousto-optic uplink communications technique |
| 02/22/2005 | US6858008 Automatic ultrasound transmit power setting method and system |
| 02/17/2005 | WO2005015369A2 Method and apparatus for high-frequency passive sonar performance prediction |
| 02/17/2005 | US20050036630 Remote energy supply process and system for an electronic information carrier |
| 02/15/2005 | US6856578 Underwater alert system |
| 02/10/2005 | DE19856876B4 Ultraschallsensoreinrichtung sowie Verfahren für eine berührungslose Erfassung von Objekten Ultrasonic sensor device and method for contactless detection of objects |
| 02/09/2005 | EP1504534A2 Wireless communication using sound |
| 02/02/2005 | CN1187906C Method and device for producing a virtual speaker having a certain distance from sound source |
| 02/01/2005 | US6850555 Signalling system |
| 01/27/2005 | DE102004029463A1 Underwater diver location system has portable housing and uses trigonometric delay processing of transponded audio frequency tone sequence |
| 01/26/2005 | EP1500059A2 Ultrasonic transmitter and receiver systems and products using the same |
| 01/20/2005 | WO2005006566A2 Adaptive audio communication code |
| 01/05/2005 | CN2669538Y Electroacoustic/acoustoelectric transducer for information acoustic wave transmission system |
| 01/05/2005 | CN1183691C Acoustic heterodyne device and method |
| 12/30/2004 | US20040264713 Adaptive audio communication code |
| 12/09/2004 | US20040247140 Parametric virtual speaker and surround-sound system |
| 12/01/2004 | EP1481891A1 Arrangement of an accoustic array with a sound velocity meter |
| 11/25/2004 | US20040233784 Arrangement with an acoustic array with a sound velocity meter |
| 11/17/2004 | CN1176527C Passive wireless ASW muti-sensor system and its frequency-division recognition method |
| 11/16/2004 | US6819630 Iterative decision feedback adaptive equalizer |
| 11/03/2004 | EP1265785B1 Apparatus for deploying a load to an underwater target position with enhanced accuracy and a method to control such apparatus |
| 11/02/2004 | US6813220 Acoustic fence |
| 11/02/2004 | US6813219 Decision feedback equalization pre-processor with turbo equalizer |
| 11/02/2004 | US6811327 Connection system for undersea acoustic antenna |
| 10/28/2004 | WO2004001961A3 Method for sensing acoustic energy |
| 10/28/2004 | US20040212504 Ultrasonic transmitter and receiver systems and products using the same |
| 10/13/2004 | EP1466407A2 Modulator- amplifier |
| 10/07/2004 | US20040196180 Dive computer with global positioning system receiver |
| 09/16/2004 | WO2004080111A2 Method and system for acoustic communication |
| 09/15/2004 | EP1457971A1 Information transmitting system, information encoder and information decoder |
| 09/08/2004 | EP1110339A4 Method and apparatus for coding an information signal using delay contour adjustment |
| 09/07/2004 | US6786087 Controlled thruster driven profiler for coastal waters |
| 09/02/2004 | US20040169581 Remote control signaling using audio watermarks |
| 08/04/2004 | CN1518250A Bluc tooth connector and method for transmitting sound by blue tooth connector |
| 08/03/2004 | US6771563 Apparatus for deploying a load to an underwater target position with enhanced accuracy and a method to control such apparatus |
| 07/22/2004 | US20040141419 Acoustic fence |
| 07/21/2004 | CN1158793C Sound communication system between portable unit and communication terminal |
| 07/21/2004 | CN1158622C Remote energy supply structure and process for electronic information carrier |
| 07/14/2004 | CN1157875C Voice-frequency signal preprocessing device of radio sound transmitting equipment |
| 07/14/2004 | CN1157874C Radio sound transmitting equipment |
| 06/30/2004 | EP1205045B1 Acoustic communication system |
| 06/30/2004 | CN1508990A Weak sound receiver |
| 06/30/2004 | CN1155877C Method and system for at the same time operating multiple hand held controller in data processing system |
| 06/24/2004 | WO2003101185A3 Buoy for fish finding method and system |
| 06/23/2004 | CN1507701A Parametric virtual speaker and surround-sound system |
| 06/16/2004 | CN1505288A Wireless communication system, wireless microphone and controlling method thereof |
| 06/10/2004 | WO2004049604A1 Wireless underwater communication system |
| 06/10/2004 | WO2004019653A3 Parametric array modulation and processing method |
| 06/08/2004 | US6747916 Communication system between a portable unit and a communication terminal |
| 06/03/2004 | US20040105344 Communication system for underwater use |
| 06/02/2004 | CN1501600A Portable throat-protective and speaking-assistant machine |
| 05/19/2004 | CN1150700C Radio sound transmitting method |
| 05/18/2004 | US6738314 Autonomous mine neutralization system |
| 05/18/2004 | US6737957 Remote control signaling using audio watermarks |
| 05/13/2004 | US20040090865 Underwater communication system |
| 05/05/2004 | CN1494714A Information transmission system, information encoding device and information decoding device |
| 04/29/2004 | WO2003091869A3 System and method for remotely producing a response in a computer using acoustic signaling |
| 04/28/2004 | EP1412831A2 Physical presence digital authentication system |
| 04/28/2004 | CN1148019C Transmission of data by ultrasound wave |
| 04/15/2004 | US20040073429 Information transmitting system, information encoder and information decoder |
| 04/08/2004 | WO2003087868A3 Ultrasonic transceiver identification tag |
| 04/08/2004 | US20040066708 Ultrasonic transmitting and receiving apparatus |
| 04/06/2004 | US6717983 Ultrasonic coding modem for digital network communication |
| 03/31/2004 | EP1402664A2 Wireless communication device and method |
| 03/24/2004 | CN1143189C System for automatically setting portable object with clock function |
| 03/18/2004 | WO2004023682A1 Data transmission system and method using sound waves |
| 03/11/2004 | US20040046483 Installation with piezoelectric element for equipping a structure and piezoelectric element for same |
| 03/04/2004 | WO2004019653A2 Parametric array modulation and processing method |
| 02/25/2004 | EP1390939A2 Method for determining current location-specific information of individuals |
| 02/19/2004 | US20040032399 Ultrasonic coordinate input apparatus |
| 02/19/2004 | US20040031856 Physical presence digital authentication system |
| 02/17/2004 | US6693847 Buoy for fish finding method and system |
| 02/12/2004 | WO2003096593A3 Wireless communication using sound |
| 02/11/2004 | EP1036441B1 Method and apparatus for carrying out high data rate underwater communication |
| 02/11/2004 | CN1138360C 调制装置 Modulation device |
| 02/10/2004 | US6690619 Underwater communication device |
| 02/04/2004 | EP1386415A1 Parametric virtual speaker and surround-sound system |
| 02/03/2004 | US6687188 Underwater telemetry apparatus and method |
| 01/15/2004 | WO2004005953A2 Dive computer with global positioning system receiver |
| 01/08/2004 | WO2004004185A1 Communication using audible tones |
| 01/08/2004 | US20040004904 Buoy for fish finding method and system |
| 01/07/2004 | EP1378079A2 Communication system for underwater use |
| 01/07/2004 | EP1378078A2 Underwater communication system |
| 01/01/2004 | US20040001553 Communication using audible tones |
| 12/31/2003 | WO2004001961A2 Method for sensing acoustic energy |
| 12/25/2003 | US20030235112 Interferometric imaging method apparatus and system |
| 12/18/2003 | WO2003001231A3 Interferometric imaging method apparatus and system |
| 12/17/2003 | EP1371219A2 Data communication over a power line |
| 12/11/2003 | WO2003101302A1 Method of generating a predetermined wave field |
| 12/11/2003 | WO2003101185A2 Buoy for fish finding method and system |
| 12/11/2003 | WO2003084081A3 Underwater communication device |
| 11/20/2003 | WO2003096593A2 Wireless communication using sound |
| 11/20/2003 | US20030215103 Parametric virtual speaker and surround-sound system |
| 11/20/2003 | US20030214881 Underwater telemetry apparatus and method |
| 11/13/2003 | WO2003093867A1 System for locating a person, animal or object using an ultrasonic signal comprising an identification code |
| 11/13/2003 | US20030212549 Wireless communication using sound |
| 11/06/2003 | WO2003091869A2 System and method for remotely producing a response in a computer using acoustic signaling |