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| Number | Title | Issue Date |
| 7307537 | Identification tag The invention relates to an identification chip for insertion in an object located in a liquid. The identification chip comprises an acoustic resonator (100), which exhibits a number of distinct resonant frequencies, where the combination of resonant frequenc... | 12/11/2007 |
| 7266477 | Method and system for sensor signal fusion The first sensor collects a first group of first sensor readings of first fixed size dependent on a range of a first sensor and safeguarding requirements of a vehicle. A second sensor collects a second group of second sensor readings of second fixed size dependent o... | 09/04/2007 |
| 7257483 | Method and apparatus for determining the position of an underwater object in real-time A method and apparatus is disclosed for providing a determined position in real-time of an underwater object using a plurality of sensors operating at various sampling rates and for using the determined position in real-time in order to perform inspection tasks inte... | 08/14/2007 |
| 7254248 | One-magnet rectangular transducer An electroacoustic transducer comprising a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap there between, the magnetic circuit comprising one magnet. The magnet can either be positioned in the center of the magne... | 08/07/2007 |
| 7242349 | Method of increasing the accuracy of geographical information of a mobile station of a radio communication system A method of increasing the accuracy of geographical information of a mobile station of a radio communication system is described. The geographical information of the mobile station is evaluated without using a GPS receiver. Stored positions of other mobile stations ... | 07/10/2007 |
| 7212563 | Real-time locating system and method using timing signal A location system includes a plurality of signal readers for receiving signals from a wireless transmitter to be located. The signals include a wideband, spread spectrum signal and a timing marker appended a predetermined time in front of the wideband, spread spectr... | 05/01/2007 |
| 7173542 | Data relay for casing mounted sensors, actuators and generators A casing sensor and methods for sensing using a casing sensor are disclosed. The casing sensor includes a casing shoe and a sensor coupled to the casing shoe. A casing data relay includes a downhole receiver coupled to a well casing and a transmitter coupled to the ... | 02/06/2007 |
| 7139647 | Methods and systems for navigating under water In a method for determining absolute position under water of a submersible vessel (1) having a dead reckoning navigation system and receiving acoustic signals from a reference station (19), signals are received from one reference station in several pos... | 11/21/2006 |
| 7085196 | Method and apparatus for gathering seismic data In the present invention, a seismic receiver contains an onboard digitizer that samples and converts a signal from detected seismic energy into the digital domain. The receiver contains an analog to digital converter, a transmission circuitry, and a link to the seis... | 08/01/2006 |
| 7075653 | Method and apparatus for laser-based remote methane leak detection A method and apparatus for remote laser-based detection of gas at levels exceeding natural background levels preferably utilizing wavelength modulated tunable diode laser absorption spectroscopy. In a preferred embodiment, background gas and noise are estimated usin... | 07/11/2006 |
| 7072244 | Underwater exterior ship hull imaging system employing a remote microprocessor controlled acoustic transducer array A multi-beam acoustic transducer array system for producing color enhanced, three dimensional, high resolution images of a ship's underwater hull, wherein the acoustic transducers can be mounted in orthogonal pairs, each pair being positioned opposite from another p... | 07/04/2006 |
| 7064669 | Electronic tether for portable objects A system and method for issuing an alarm when the separation distance between a monitoring module associated with an object (animate or inanimate) and an alert module exceeds a preset threshold distance thereby forming a leadless electronic tether between the object... | 06/20/2006 |
| 7016260 | Seismic data acquisition system using acquisition stations set on the sea bottom The invention is a system designed for acquisition of seismic data by means of acquisition stations set on water bottom of a water body. The system comprises acquisition stations (DSAU) combining a streamlined boom suited to penetrate the bottom and thus couple seis... | 03/21/2006 |
| 6999896 | Identical object determination method and apparatus and displacement correction method and apparatus An identical object determination method of determining whether or not objects are detected by a plurality of sensors identical has a determining a relative position and speed thereof, a determining a position error thereof based on the determined positions and calc... | 02/14/2006 |
| 6995846 | System and method for remote quantitative detection of fluid leaks from a natural gas or oil pipeline A system for remote quantitative detection of fluid leaks from a natural gas or oil pipeline by use of an airborne platform; including at least one laser light source for nearly simultaneous illuminating two or more target fluids and a background, wherein the two or... | 02/07/2006 |
| 6980688 | Method and apparatus for investigating integrity of structural member A method for investigating structural integrity utilizes a carrier member having a flexible surface and a plurality of electromechanical transducer elements attached to the carrier member, the transducer elements being spaced from each other along at least two spati... | 12/27/2005 |
| 6972715 | Dive computer with global positioning system receiver Dive computers and methods of logging information including position, audio and video information are disclosed. In one embodiment, the invention includes a processor, a global positioning system receiver connected to the processor and a pressure transducer connecte... | 12/06/2005 |
| 6970097 | Location system using retransmission of identifying information A location system and method for determining the location of a tagged item in a facility. In one embodiment, the location system includes a plurality of room transmitters designed to be located throughout the facility. Each room transmitter has a unique signature. T... | 11/29/2005 |
| 6954175 | Accurate positioning of devices suspended underwater from a floating body A system for determining the position of a device attached to a floating platform floating at the surface of a body of water. The system includes first and second navigation antennas mounted on the platform. A device is mounted to the platform in a position collinea... | 10/11/2005 |
| 6950019 | Multiple-triggering alarm system by transmitters and portable receiver-buzzer The invention concerns transmitters and a portable receiver-buzzer with programmable triggering, hand-, voice-/sound- and pulse-operated, for remotely warning one or several persons. The inventive device consists of a receiver-buzzer case (16), a presence-det... | 09/27/2005 |
| 6944096 | Method of accurately determining positions of deployed seismic geophones A method is provided for accurately determining the physical location of a deployed seismic geophone used in seismic investigations by using a portable navigational satellite receiver to obtain a set of navigational satellite measurements providing the position of t... | 09/13/2005 |
| 6941226 | Method for determining, recording and sending GPS location data in an underwater environment Underwater position determination is provided by combining sonar-derived ranging data between a sonar receiver and a sonar transmitter with GPS position data to provide geographically-referenced position data accurately representing the position of a sonar receiver ... | 09/06/2005 |
| 6933884 | System for tracking and monitoring vessels A system for remotely tracking, monitoring and messaging vessels (14) utilizing a global positioning system satellite constellation, having a transceiver located on the vessel to be tracked and monitored, a monitoring center located remote from the vessel, a ... | 08/23/2005 |
| 6919793 | Radio frequency identification system write broadcast capability A Write Broadcast system and method uses a base station to write sent data to all or some selected number (sub group) of tags in a base station field simultaneously. By unselecting the tags that have been successfully written to, and requesting a response from the r... | 07/19/2005 |
| 6803943 | Marine plant field survey method and survey system utilizing the survey method A marine plant field survey method includes the step of using a submarine mobile video system capable of taking images underwater to measure degree of macrophyte coverage in a marine plant field by taking wide-field images of macrophytes from above and a step of usi... | 10/12/2004 |
| 6768414 | Radio frequency identification system write broadcast capability A Write Broadcast system and method uses a base station to write sent data to all or some selected number (sub group) of tags in a base station field simultaneously. By unselecting the tags that have been successfully written to, and requesting a response from the r... | 07/27/2004 |
| 6674687 | System and method for navigation using two-way ultrasonic positioning A two-way ultrasonic positioning and navigation system and method involve a plurality of objects each capable of transmitting and receiving ultrasonic signals. A first object transmits an initiating ultrasonic signal and identifies a second object for res... | 01/06/2004 |
| 6233202 | Dipping sonar transducer housing A dipping sonar transducer housing includes a generally cylindrical housing (10) which is suspended at the end of a cable (12) connected to tile housing through a vibration isolation module (14) which includes springs (22) to damp out noise, particularly ... | 05/15/2001 |
| 6163503 | System, apparatus, and method for geographic positioning of marine fauna A system, apparatus, and method for determining positions of underwater animals involves emplacement of an acoustic transponder on the animal and establishing communications with a transponder carried by a vessel whose position can be determined by receiv... | 12/19/2000 |
| 5942987 | Radio frequency identification system with write broadcast capability A Write Broadcast system and method uses a base station to write sent data associated with no particular destination tag or tags, by radio frequency signal, to all or some selected number (sub group) of tags in a base station field simultaneously. By unse... | 08/24/1999 |
| 5872516 | Ultrasonic transceiver and remote controlled devices for pets An ultrasonic transceiver device and remote output devices controlled by the transceiver for use by domestic pets. The transceiver utilizes a fixed interval edge detect modulation system to lock out stray environmental noise thereby, avoiding false trigge... | 02/16/1999 |
| 5812065 | Modulation of the resonant frequency of a circuit using an energy field A transponder has a resonant RLC circuit with one or more electromagnetic energy storage components that vary in response to an externally applied modulating energy field. In addition to the externally modulating energy field, a base station transmits a c... | 09/22/1998 |
| 5691957 | Ocean acoustic tomography An acoustic tomography telemetry system and method allowing spatially averaged ocean temperatures to be measured in real-time. The system includes autonomous acoustic sources mounted on subsurface moorings and receivers that are either suspended from drif... | 11/25/1997 |
| 5504477 | Tracking system A performer tracking system, and an associated method, for tracking movements of at least one performer upon a stage. A plurality of signal transmitters are positioned about the stage and transmit electromagnetic signals. Performers on the stage carry tra... | 04/02/1996 |
| 5497356 | Method and apparatus for verifying the location of a seismic bottom cable in real time One or more slave acoustic transponders are secured to selected parts of a seismic bottom cable whose location is imperfectly known. A master transponder broadcasts an interrogation pulse from each of a number of different, known locations distributed alo... | 03/05/1996 |
| 5469403 | Digital sonar system A transponder of an active digital sonar system identifies a multifrequency underwater activating sonar signal received from a remote sonar transmitter. The transponder includes a transducer that receives acoustic waves, including the activating sonar sig... | 11/21/1995 |
| 5452262 | Radio telemetry buoy for long-range communication A remotely controlled radio telemetry buoy serves as a communication link tween an underwater acoustic interrogation/receiving transponder system and a remotely located surface platform. The buoy houses a transmission device, a transceiver device and a co... | 09/19/1995 |
| 5426617 | Long baseline tracking system A method for reliably locating the position of a submerged submarine with spect to a surface ship. A multiple number of transponders are placed at known locations near the sea floor, in the area of the ship and the submarine. One transponder has a dual fu... | 06/20/1995 |
| 5392771 | Underwater monitoring and communication system A monitoring device for portable breathing apparatuses having a manometer by means of which the pressure in the pressure container of the breathing apparatus is detected, and having a transmitter by means of which a signal corresponding to the pressure is... | 02/28/1995 |
| 5346210 | Object locator system An object locating system, especially for use in locating a gaming ball in the game of football, utilizes a series of three sensors positioned on one side of a football playing field and a calibration source positioned on the other side. The calibration s... | 09/13/1994 |
