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Patent Searching and Data


Matches 651 - 700 out of 2,575

Document Document Title
WO/2002/054110A1
A subsea navigation system comprising a plurality of spaced antenna means (4) provided on a subsea structure (1, 2) arranged to emit electromagnetic radiation. A detection means (7) is provided on a subsea vehicle (3) for receiving and a...  
WO/2002/054635A1
Methods of subsea communication in which a cathodic protection anode (13) is used as a transmitting antenna. The signals are received at a second location by means of two electrodes (22, 23, 32, 33) which are spaced by different distance...  
WO/2002/046859A2
A low-power, short-range communications system (Figure 1) is disclosed. The communications system comprises a transmitter that is operative to generate a high impedance signal and a receiver that is operative to detect the high impedance...  
WO/2001/095529A1
An underwater communications system comprises a first and second communication station (1, 7) each of which is provided with an aerial (5, 8) which is surrounded by a waterproof, electrically insulating material (15). When the aerials ar...  
WO/2001/089014A1
This invention relates to fuel cells, and in one embodiment, to fuel cells (10) that are especially well suited for downhole use in oil and gas wells (200), and for subsea use in connection with offshore wells.  
WO/2001/067628A2
Methods for driving a lossy transmission media with an energy wave defined by a an exponential waveform function. The propagation delay and attenuation of the wave is a function of an exponential coefficient, and its propagation velocity...  
WO/2001/055555A1
A current impedance device in the form of a ferromagnetic choke in a petroleum well where a voltage potential is developed across the choke to power and communicate with devices and sensors in the well. The petroleum well includes a case...  
WO2001018763A3
A method and device for the transmission of control and/or sensor signals between an electronic control and/or data receiving means and a pneumatic device, which are connected together by means of a pneumatic line of flexible plastic mat...  
WO/2001/033662A1
An electromagnetic antenna extension assembly for connection downhole into a pipe string between a data transmission unit and an electromagnetic antenna. Further, a method for connecting the data transmission unit with the antenna utiliz...  
WO/2001/018763A2
The invention relates to a method and a device for the transmission of control and/or sensor signals between an electronic control and/or data receiving device (21) and a pneumatic device (10), which are connected to one another by a pne...  
WO/2001/011807A1
A synchronized communication system for communicating signals into and from a medium is disclosed. The communication system utilizes a transmitter located at a central station external to the medium, which transmits a low frequency synch...  
WO/2000/060777A1
A data communication system is provided for communicating with an underground instrument package positioned on a drilling apparatus. The drilling apparatus has an insulated section between first and second conductive sections. The system...  
WO2000011817A3
Disclosed is a method for transmitting information and a system therefor which is particularly suitable for digital transmission. At least one information signal consisting of a reference frequency channel and at least one information fr...  
WO/2000/015931A1
The invention relates to an electronic communications system for a vehicle comprising a base station (1) arranged in the vehicle, and has at least one movable data carrier (2) configured for exchanging data signals with the base station....  
WO/2000/013329A1
A personal communications apparatus comprises a first part, having a microphone (114), and a second part, having a loudspeaker (118). The first part is adapted to be worn on a user's wrist (202) and the second part is adapted to be worn ...  
WO/2000/011817A2
Disclosed is a method for transmitting information and a system therefor which is particularly suitable for digital transmission. At least one information signal consisting of a reference frequency channel and at least one information fr...  
WO/2000/008438A1
When a pipeline is used as a medium for data transmission using a VLF or ELF Electro-magnetic signal the presence of corrosion effects on the pipeline lead to noise signals appearing in the received data signal. The present invention rel...  
WO/1999/037044A1
A data transmission system for use in extracting data from a downhole location in a well is disclosed. The well has electrically conductive downhole structure (2, C) which together with an earth return forms a signal circuit which is use...  
WO1999025070A3
A communication system for use with a device located within a containment vessel, comprises a control unit having means providing two-way packet radio frequency communication; a command unit for attachment to a device in a vessel and hav...  
WO/1999/029058A1
An underwater modulator-demodulator (modem) apparatus for transmitting and receiving data at a high rate through water, said modem comprising: a) a transmitting section comprising: data source means, comprising digital data to be transmi...  
WO/1999/025070A2
A communication system for use with a device located within a containment vessel, comprises a control unit having means providing two-way packet radio frequency communication; a command unit for attachment to a device in a vessel and hav...  
WO/1999/019751A1
A drill stem communication system for transmitting data between downhole and uphole locations in a borehole includes at least one transducer (40, 40') at a first location on a drill stem (18) for modulating motion and/or stress in the dr...  
WO/1999/009683A1
A personal underwater communication device which comprises: a display; a memory unit for storing a plurality of preset messages, each message being assigned a common message identification code; means for assigning a unique identificatio...  
WO/1998/051025A1
A biological function assisting means (1) is buried in the body of an organism and has a transmitter (11) and a receiver (12) for the communication with an external control means (2). The external control means (2) controls the biologica...  
WO/1998/045969A1
Disclosed is a communication and alert device for underwater divers, worn on the wrist of the diver or elsewhere and comprising an ultrasound transmitter (36) and receiver (42) operated by a microprocessor (30). A manual control element ...  
WO/1998/023849A1
The application discloses a method of receiving data from a sensor associated with a drill string the sensor and drill string, being located in a borehole or the like, the method comprises: supplying an electrical signal to the drill str...  
WO1998013960A3  
WO/1998/013960A2
A pipeline communication system employs the pipeline (10) and the adjacent ground and includes branches with junctions (11 and 12). Governor modules (14) and transformer/rectifiers form part of the network. Monitors (16, 17 and 18) perio...  
WO/1997/035388A1
A method and apparatus are disclosed for controlling the quantum state probability distribution of one quantum object (S2 or I1) of a pair of correlated quantum objects (S1 and I1, or S2 and I2), which include providing a pair of correla...  
WO/1997/031438A1
A telemetry method for a metal structure (19) protected from oxidation by current tapping (1, 2). The method uses the structure (19) itself as the medium for data transmission from at least one transmitter connected to the structure, sai...  
WO/1997/026551A1
An underwater communications device (10), wherein each device includes: a signal receiver, a signal transmitter, a transducer (12) associated with the signal receiver and with the signal transmitter, and having a first field of view; a c...  
WO/1996/036134A1
A wireless system includes a transmitter (14) and a receiver (22) that are coupled through a user (10) and room ground (11). The transmitter produces low-frequency, low power signals that, through capacitive coupling, pass as displacemen...  
WO/1996/023373A1
Audio apparatus comprises a base unit including circuitry for generating electrical signals representing sounds and at least one earphone adapted to receive the electrical signals and to reproduce sounds represented by the signals, in wh...  
WO/1995/019678A1
Waterborne acoustic signals are received and processed into electrical driver signals to energize a transducer (30) held in selectively controllable vibration-transmitting engagement with a tooth (29) of an underwater diver. The transduc...  
WO/1995/017797A1
The invention relates to communications technology, more specifically, to the transmission of information, especially over long and ultra-long distances. According to the invention, the transmission of information involves the creation o...  
WO/1994/010629A1
An underwater local area network (10) for oceanographic observation and data acquisition includes a network node (14) for telemetering data to a final destination and plurality of sensors each of the sensors having an acoustic modem to t...  
WO1993026115A3
PCT No. PCT/GB93/01272 Sec. 371 Date Dec. 13, 1994 Sec. 102(e) Date Dec. 13, 1994 PCT Filed Jun. 15, 1993 PCT Pub. No. WO93/26115 PCT Pub. Date Dec. 23, 1993A sub-sea oil pipeline installation comprising a production platform (10) and su...  
WO/1993/026115A2
A sub-sea oil pipeline installation comprising a production platform (10) and sub-sea facilities (15) at a plurality of wellheads (16), has a data transmission system by which data is transmitted in either direction between the master pl...  
WO/1991/011061A1
A system for communication between two stations, at least one of which is mobile, intended in particular for communication in a marine environment between an autonomous underwater vehicle (1) and a surface vehicle (2). The system include...  
WO/1990/002958A1
This invention relates to an underwater detector which emits an ultrasonic detection signal by use of a transmitter disposed at a first position in water, detects the underwater condition by receiving a reflection signal resulting from t...  
WO/1987/003154A1
An optical underwater communicator for a diver for transmitting and receiving vocal communications by modulated infrared light. A face mask (34) defines an air envelope covering a portion of the divers's face. A microphone (88) converts ...  
WO/1979/000462A1
A method and an arrangement for reducing the demand on the number of transferred bits when transferring PCM information. Polarity and amplitude information are transmitted from a transmitter side to a receiver side, expressed by binary c...  
JP6896632B2
A communication apparatus of the disclosure includes: an authentication section that performs personal authentication of a user through BAN (Body Area Network) communication prior to data exchange with a communication peer for predetermi...  
JP2021083067A
To provide a signal processing method and a signal processing system. A transmission code having a finite length including a real part of a complex number series as a first component and an imaginary part of the complex number series as ...  
JPWO2019211997A1
A communication device according to an embodiment of the present technology includes a receiving unit, a determination unit, and a band control unit. The receiving unit receives a radio signal including signals of a plurality of communic...  
JP6848320B2
An underwater mobile body includes: a communication unit that has a plurality of communicators adopting different communication systems and that performs underwater wireless communication with another device using one of the plurality of...  
JP2021044855A
To provide a non-contact power supply system and a non-contact power supply device capable of suitably supplying power.In a non-contact power supply system 1, an antenna unit has at least three or more meander-shaped antenna elements 21a...  
JP2021034840A
To provide a stable wireless communication environment inside a structure or a mobile body with a simple configuration.A signal transmission device includes: a first antenna that transmits a radio wave containing a signal modulated with ...  
JP6832218B2
To reduce instability due to environmental variation and thereby perform in-vivo information transmission stably with high quality.A signal generation unit 11 generates a signal wave by modulating a carrier wave on the basis of communica...  
JP2021506194A
In the embodiments described, the sensor-based communication device 100 is disclosed. The communication device 100 is associated with its own unique pulse signature 200 and comprises a plurality of sensor nodes 112 adapted to communicate...  

Matches 651 - 700 out of 2,575