Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7583225 | Low earth orbit satellite data uplink A low earth orbit (LEO) satellite data uplink is provided. In one embodiment, a method of providing a data uplink to a LEO satellite includes determining position information using a LEO signal received from the LEO satellite, a first ranging signal received from a ... | 09/01/2009 |
| 7372839 | Global positioning system (GPS) based secure access Presented herein are systems and methods for global positioning system based secure access. A request for access to a computer network is received. A determination is made whether a mobile terminal is within a predetermined location. If the mobile terminal is within... | 05/13/2008 |
| 7372400 | Methods and apparatus for a navigation system with reduced susceptibility to interference and jamming A navigation system provides a significant level of protection against all forms of interference or jamming to GPS in a cost-effective way. The system employs a network of ground reference stations and Low Earth Orbiting (LEO) satellites in conjunction with GPS. A c... | 05/13/2008 |
| 7362262 | Method and apparatus for providing an integrated communications, navigation and surveillance satellite system An integrated communications, navigation and surveillance system includes a plurality of satellites in communication with one another and broadcasting navigation signals. The satellites are capable of bi-directional communication and of receiving and relaying survei... | 04/22/2008 |
| 7345652 | Antenna system and RF signal interference abatement method Disclosed is an antenna system including a Luneberg Lens having a spherically shaped outer surface and a spherically shaped focal surface spaced from its outer surface with a plurality of patch antenna elements disposed along the focal surface of the Luneberg Lens; ... | 03/18/2008 |
| 7302225 | Time acquisition in a wireless position determination system A system and method for providing timing information to a wireless device in a position determination system is disclosed. A wireless device includes a reference signal receiver, a signal processor, a wireless communications transceiver and a GPS receiver. The wirel... | 11/27/2007 |
| 7295633 | Triple multiplexing spread spectrum receiver A GPS car navigation system derives GPS position update information from motion of the car along the actual track. Turns along the track are detected when they actually occur and are compared with the predicted turns so that the time and position at the actual turn ... | 11/13/2007 |
| 7283567 | Network delay identification method and apparatus Network delay is determined in order to synchronize a clock in a mobile station with a reference clock. Tones are generated that represent a sequence of bits in a synchronization flag. The tones are sampled beginning at a selected sample start time. The sampled tone... | 10/16/2007 |
| 7271765 | Applications processor including a database system, for use in a wireless location system An Applications Processor (14) including a centralized database system is used in a wireless location system (WLS). The APs 14 may be used to manage resources in the WLS, including signal collection systems (SCSs 10) and TDOA location processors... | 09/18/2007 |
| 7272401 | Apparatus and method for determining position information of user equipment An apparatus for determining position information of one or more UEs (User Equipments), which includes a plurality of Node Bs for transmitting propagation signals to UEs positioned in a specific cell, and generating predetermined data for measuring position informat... | 09/18/2007 |
| 7268727 | Method and apparatus for improved position, velocity, orientation or angular rate sensor A global navigation satellite system (GNSS) receiver system includes a processing unit; and one or more antenna units for receiving GNSS signals, each of the antenna units having a phase center; one or more inertial sensor units each positioned substantially adjacen... | 09/11/2007 |
| 7254402 | GPS satellite signal acquisition assistance system and method in a wireless communications network A system and method for assisting an integrated GPS/wireless terminal unit in acquiring one or more GPS satellite signals from the GPS satellite constellation. The invention includes a method for narrowing the PN-code phase search. That is, by accounting for the var... | 08/07/2007 |
| 7215954 | Resource allocation method for multi-platform communication system A mobile wireless communications system including a plurality of individual transponding nodes of various types, all in communication with a central processing hub. A local user signal is processed by the central processing hub and radiated through multiple paths to... | 05/08/2007 |
| 7202813 | GPS reference system providing a synthetic offset vector for dithering a rover station position A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established ref... | 04/10/2007 |
| 7200359 | Dual transmission emergency communication system A telematic emergency communication system is provided. The system includes a user terminal that generates emergency communication signals within an emergency signal band. A spacecraft network has a first emergency mode receiver and attempts to receive the emergency... | 04/03/2007 |
| 7164662 | Network delay identification method and apparatus Network delay is determined in order to synchronize a clock in a mobile station with a reference clock. Tone are generated that represent a sequence of bits in a synchronization flag. The tones are sampled beginning at a selected sample start time. The sampled tones... | 01/16/2007 |
| 7126536 | Position location using terrestrial digital video broadcast television signals A method and computer program product for determining the position of a user terminal includes receiving at the user terminal a plurality of digital television (DTV) broadcast signals from a plurality of DTV transmitters, wherein each of the DTV signals is a Europea... | 10/24/2006 |
| 7102563 | Methods and apparatuses of estimating the position of a mobile user in a system of satellite differential navigation Disclosed are methods and apparatuses for estimating the floating ambiguities associated with the measurement of the carrier signals of a plurality of global positioning satellites, such that the floating ambiguities are preferably consist for a plurality of differe... | 09/05/2006 |
| 7069021 | Method and a system for positioning of an electronic device, and an electronic device A method is provided for determining the position of an electronic device by receiving a code modulated signal transmitted by satellites, and position information of the satellites and time data, and by generating local time data. In the method, delta range measurem... | 06/27/2006 |
| 7050818 | Location based service request system A wireless phone based system to accommodate users of wireless phones for providing information as to the location of certain services such as gasoline stations, movie theatres, drug stores, etc., includes the utilization of a GPS receiver and a wireless phone, with... | 05/23/2006 |
| 7046718 | Coherent phase synchronous code division multiple access communications from multiple transponder platforms A method for coherent phase synchronous CDMA communications between a gateway and multiple subscribers via multiple transponder platforms that includes the step of synchronizing a local reference clock for each subscriber in a service area to a single master referen... | 05/16/2006 |
| 7042392 | GPS access system and method This invention describes a means for acquiring GPS P/Y code under jamming conditions. It improves jam resistance by augmenting a component of the GPS signal with one from a different satellite system, such as a low earth orbiting (LEO) satellite. The preferred embod... | 05/09/2006 |
| 7031722 | Method for positioning a mobile station The present invention is directed to a method for locating a mobile station, comprising the steps of using fixed transmitting stations for locating a target mobile station by transmitting a measurement signal from each fixed transmitting station to the mobile statio... | 04/18/2006 |
| 7020462 | Communications system using a satellite-based network with a plurality of spot beams providing ubiquitous coverage from two different satellites A satellite-based communications system operating at high data rates includes a plurality of satellites each having uplink and downlink antennas for transmitting and receiving a plurality of signals utilizing a plurality of spot beams to and from a plurality of cove... | 03/28/2006 |
| 6999026 | Information management and control system A system 10 which is adapted to receive global positioning signals 14 from a satellite assembly 12 and which determines, displays, and selectively disseminates that error associated with the received signals to selected users at selected locatio... | 02/14/2006 |
| 6965884 | System and method for transmitting data between terminals based upon progress vectors By employing easy determination logic, the amount of communication required for broadcasting and relaying is effectively reduced, and the message transmission efficiency is improved. A mobile terminal T2 includes determination logic. According to this logic, ... | 11/15/2005 |
| 6963304 | Method and apparatus for providing an integrated communications, navigation and surveillance satellite system A system for providing integrated communications, navigation and surveillance capabilities. A space segment comprises a plurality of time synchronized satellites broadcasting navigation signals and have two-way communication capabilities. A terrestrial segment compr... | 11/08/2005 |
| 6947746 | Mobile communications system, mobile station, control method and recording medium A mobile station that can suppress repetitive location registration. If a cell reselection instruction is issued for a cell, the mobile Station determines whether the new cell is listed in a history of cells in which the mobile station has existed before. If the new... | 09/20/2005 |
| 6941138 | Concurrent communications between a user terminal and multiple stratospheric transponder platforms A method for communicating between a user terminal and multiple stratospheric transponder platforms includes the steps of positioning a plurality of stratospheric transponder platforms (102, 104, 106, 108) in a substantially fixed position (152) with r... | 09/06/2005 |
| 6934626 | Low-cost, low-power geolocation system A system and method for determining the location of a transmission source by processing the magnitude of the transmitted signal received at a plurality of receivers with a statistical model of the signal propagation characteristics associated with the signal space b... | 08/23/2005 |
| 6922635 | Method and system for determining absolute positions of mobile communications devices using remotely generated positioning information Absolute positions of global position system (“GPS”) enabled mobile communications devices, which form a wirelessly networked group of GPS mobiles, can be determined at each of the mobiles based on use of wireless communications capabilities of the mobiles for o... | 07/26/2005 |
| 6907224 | Time acquisition in a wireless position determination system A system and method provide aiding information to a wireless device. The wireless device extracts a snippet of a received reference signal, generates a timestamp representing the time of reception thereof, and transmits the snippet and timestamp to a position determ... | 06/14/2005 |
| 6833813 | Method, receiver and system for determining the time of reception of a beacon signal The invention relates to a method and to devices for determining in a positioning system the time of reception of a beacon signal which was received and tracked by a receiver. In order to enable a re-acquisition of the system time based on a noisy received signal, i... | 12/21/2004 |
| 6816705 | Satellite communication system and method A satellite communications system and method, where a satellite 10 can pass messages between a user terminal 44 and an earth station 38, as the satellite moves in an orbit 12 12′ as indicated by arrow 46, comprises means for meas... | 11/09/2004 |
| 6696942 | Emergency warning network An emergency warning network including a base station for broadcasting a warning signal and a first, earth-orbiting satellite for receiving the warning signal and rebroadcasting such to extend the range of communications of the base station. A first subst... | 02/24/2004 |
| 6683563 | System for determining precise orbit of satellite and method thereof In a system for determining a precise orbit of a satellite, a satellite control system includes a tracking, telemetry and command module for receiving telemetry data from the satellite, tracking the satellite, and performing link to the satellite; a satel... | 01/27/2004 |
| 6680696 | Positioning satellite system for measuring position of signal source A satellite system includes a signal source located on a surface of the earth, a surface of water, or in air; an orbiting satellite for measuring a position of the signal source, having a GPS receiver which receives a GPS signal from a GPS satellite syste... | 01/20/2004 |
| 6677893 | Method and apparatus for locating the source of unknown signal A method of locating the source of an unknown signal of varying frequency received by receive antennas (16, 18) via relay satellites (12, 14) involves downconversion of received signals to a first intermediate frequency (IF) and band-limiting the downconv... | 01/13/2004 |
| 6674398 | Method and apparatus for providing an integrated communications, navigation and surveillance satellite system A system for providing integrated communications, navigation and surveillance capabilities. A space segment comprises a plurality of time synchronized satellites broadcasting navigation signals and have two-way communication capabilities. Each satellite a... | 01/06/2004 |
| 6658332 | Anti-terrorism shipping control An anti-terrorist ship control system includes satellites that automatically take control of a waterborne vessel when the vessel's position or speed deviate from planned tracks or when the vessel transmits a distress signal or when the vessel stops report... | 12/02/2003 |
