223974 ⎘
Transmission systems characterised by the medium used for transmission, not provided for in groups - Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
System and method for enhancing speech of a diver wearing a mouthpiece
#302Communication applications
#303Downhole telemetry signalling apparatus
#304System and method for data transmission via acoustic channels
#305Underwater vehicle communications system
#306ACOUSTIC TELEMETRY OF SUBSEA MEASUREMENTS FROM AN OFFSHORE WELL
#307System for measuring a time offset and method of measuring a time offset
#308Broadband sound source for long distance underwater sound propagation
#309Underwater data transfer system
#310Underwater data transfer system
#311PORTABLE SEISMIC COMMUNICATION DEVICE
#312ULTRASONIC UNDERWATER PAGER
#313Systems and methods for establishing an underwater optical communication network
#314Underwater communications
#315Underwater communications
#316Underwater communications
#317Underwater communications
#318Underwater communications
#319Underwater communications
#320Underwater communications
#321Inter-diver signaling device and process
#322Methods and systems for high bandwidth optical communication
#323BLACKBOX POSITION REPORTING DEVICE
#324CONTACTLESS UNDERWATER COMMUNICATION DEVICE
#325SYSTEM FOR MONITORING UNDERWATER CHARACTERISTICS
#326Portable wireless through-the-earth communication system
#327SUBMERSIBLE VESSEL DATA COMMUNICATIONS SYSTEM
#328Seismic Telemetry and Communications System
#329Diver audio communication system
#330Communications system
#331Water based vehicle communications system
#332Communications system
#333Communications system
#334Underwater communication system
#335Diver communication system
#336Communications system
#337Underwater camera communication system
#338DEVICE AND METHOD FOR TRANSMITTING INFORMATION IN SOLID MEDIA
#339Photo-receptor for electro-magnetic radiation collection
#340High speed underwater data transmission method
#341SYSTEMS AND METHODS FOR UNDERWATER OPTICAL COMMUNICATION
#342System for underwater communications comprising fluid modifying means
#343Subsea transfer system providing wireless data transfer, electrical power transfer and navigation
#344Device for propagation of electromagnetic waves through water
#345Common wave and sideband mitigation communication systems and methods for increasing communication speeds, spectral efficiency and enabling other benefits
#346Diver Monitoring and Communication System
#347Underwater wireless communications hotspot
#348Dispersion control in underwater electromagnetic communications systems
#349Undersea seismic monitoring network
#350Apparatus, systems and methods including nonbinary low density parity check coding for enhanced multicarrier underwater acoustic communications
#351COMMUNICATION BETWEEN SUBMERGED STATION AND AIRBORNE VEHICLE
#352SYSTEMS AND METHODS FOR THROUGH-THE-EARTH COMMUNICATIONS
#353Underwater synchronisation system
#354Sea vessel tagging apparatus and system
#355Wireless underwater hull inspection system
#356Underwater radio antenna
#357Buoy supported underwater radio antenna
#358MULTIBEAM, MULTIFREQUENCY SONAR METHOD AND APPARATUS
#359Signal processing in downhole equipment
#360Underwater data transfer system
#361Wireless auxiliary monitoring and control system for an underwater installation
#362Underwater communications system
#363Underwater remote sensing
#364Electromagnetic beam-forming antennas underwater
#365Underwater communications system comprising relay transceiver
#366Underwater communications system with adaptable carrier frequency
#367Electromagnetic/acoustic underwater communications system
#368Underwater navigation
#369Underwater remote sensing
#370Delivery systems for pressure protecting and delivering a submerged payload and methods for using the same
#371Underwater communication system
#372Underwater navigation system
#373Antenna for underwater communications
#374Communication system for survey source and receiver
#375High-speed underwater data transmission system and method
#376Communication network system and communication method thereof
#377Downlink while pumps are off
#378System and method for secure communication of collected amphibious data
#379Apparatus and method for sending and receiving free space optical signals
#380Underwater communications
#381Data communications
#382Multimode Communications System
#383Doppler tracking method and device for a wide band modem
#384Dive computer system
#385Inter-diver signaling device and process
#386Sub-surface communications system and method
#387Water submersible electronics assembly and methods of use
#388Underwater optical communications system and method
#389Water submersible communications devices and methods for using the same
#390Method for simultaneous transmission of soundwaves and, in particular, sonar pulses, without interference
#391MULTIBEAM, MULTIFREQUENCY SONAR METHOD AND APPARATUS
#392Communication device and communication method of underwater vehicle
#393Technique and Apparatus to Track and Position Electromagnetic Receivers
#394Underground data communications system
#395Systems and Methods for Providing Connectivity in an Underwater Environment
#396Circuit and method for generating a current pulse in a waveguide
#397Systems and methods for underwater optical communication
#398Distributed underwater electromagnetic communication system
#399Correlation based decision-feedback equalizer for underwater acoustic communications
#400Buried radio device
#401Subsea communication system and technique
#402Underwater communications system and method
#403Submarine remote surface platform
#404System and method for underwater data communication
#405Through-the-earth radio
#406Asymmetric information transmission system using an electric near field
#407Data-fusion receiver
#408Apparatus and method for transmitting data in an aqueous medium
#409Methods and apparatus for underwater wireless optical communication
#410Underwater data communication and instrument release management system
#411High range rate signaling
#412Water acoustic coherently communication system and signal processing method having high code rate, low probability of error
#413Seismic defense system
#414Compact electric dipole driven system for geophysical detection, interrogation, and exploration
#415Ceramic piezoelectric underwater detection and 5th generation mobile phone antenna
#416Notification system and apparatus
#417Node positioning method for underwater wireless sensor network (UWSN) based on zeroing neural dynamics (ZND)
#418Method and related systems for communication via extremely low and ultra low frequency electromagnetic waves
#419Systems, methods, and computer-readable media of automatic network slicing of underwater acoustic communication system resources
#420Apparatus, methods and systems for surface electromagnetic wave (SEW)-based underwater and underground communication and imaging
#421Devices, systems, and methods for laser-based communications
#422Antenna connector with integrated coaxial 50-ohm radio-frequency switch
#423Array of VLF scatterers for control of electromagnetic wave propagation on the ocean surface
#424Launcher of electromagnetic surface wave propagating along seawater-air or ground-air interface
#425Underwater wireless communication apparatus and communication method thereof
#426Systems and methods for generating and transmitting ULF/VLF signals
#427System and method for providing underwater media capture
#428Releasable forward section of an underwater vehicle
#429Bandgap modulation for underwater communications and energy harvesting
#430Free space fiber-optic connector
#431Systems, apparatuses, and methods for generating and/or utilizing scalar-longitudinal waves
#432Through-the-earth (TTE) communication systems and methods