Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7391369 | Method of and apparatus for eliminating quadrature-generated signals in magnetic cross-loop antennas A technique for reducing radio frequency signal navigation errors in systems such as Loran-C and the like, comprising the use of an orthogonally crossed pair of antenna windings on a ferrite cross, tuned to the carrier radio frequency to generate from the received s... | 06/24/2008 |
| 7315277 | Bit depth reduction for analog to digital conversion in global positioning system Disclosed is a system and method for reducing a bit-depth requirement for an A/D converter in a GPS receiver having an antenna for receiving an analog input signal and a low noise amplifier for amplifying the input signal, comprising a filter for filtering about a b... | 01/01/2008 |
| 7274332 | Multiple evaluators for evaluation of a purality of conditions A system and method is disclosed for locating people or objects. In particular, a system and method for locating a wireless mobile station using a plurality of mobile station location estimators is disclosed. The system is useful for 911 emergency calls, tracking, r... | 09/25/2007 |
| 7260395 | Apparatus and method for wireless local area networks of different countries The present invention relates to apparatus and methods for adapting a mobile unit to communication requirements of a particular country or geographic region. A wireless local area network communications system may include access points and remote terminals. Remote t... | 08/21/2007 |
| 7207517 | Munition with integrity gated go/no-go decision A munition is presented which includes an integrity verification system that measures the integrity of the munition. When an integrity threshold is not met, engagement of the munition with a predetermined target is aborted. Also presented is a methodology for gating... | 04/24/2007 |
| 7206849 | Communication in a wireless communications network when a mobile computer terminal may be unreachable A method and apparatus for communication between a mobile computer terminal and a host computer in a system in which it is necessary for the mobile computer terminal to send a message to the host computer at a particular time. The specific time at which the mobile c... | 04/17/2007 |
| 7202816 | Utilization of the approximate location of a device determined from ambient signals The present invention employs approximate device locations determined from changes in the sensed strength of radio signals at different locations. In one instance of the invention, the approximate device locations are based on inference procedures that are used to p... | 04/10/2007 |
| 7181750 | Disc drive apparatus In a disc drive apparatus, provided in the front face thereof is a changeover switch for changing over settings between a master and a slave in working of disc drive apparatus. Changeover switch is electrically connected to a substrate in the interior thereof by a c... | 02/20/2007 |
| 7102465 | Frequency discrete LC filter bank An inductive (“L”)-capacitive (“C”) filter bank has application for use in a television receiver. The LC filter includes inductors configured in at least one inductive (“L”) bank, and capacitors configured in at least one capacitive (“C”) bank. The i... | 09/05/2006 |
| 7096002 | Security system A navigation unit on board a mode of transportation is coupled to a communication device for transmitting an emergency call to a remote tracking center when an emergency button on the mode of transportation is depressed. The communication device is not audible or vi... | 08/22/2006 |
| 7088202 | Methods and apparatus for an improved discrete LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ... | 08/08/2006 |
| 7072956 | Methods and systems for context-aware policy determination and enforcement Context aware computing systems and methods are described. In one described embodiment, devices and methods are provided that are context-aware (in one example—location-aware) in that they provide for the application and enforcement of various policies as a functi... | 07/04/2006 |
| 7064705 | Method of and apparatus for increasing the peak output pulse power delivered by capacitor-driven high-power diode and square-loop saturable reactor pulse compression generators with the aid of minority carrier sweep-out circuits within the pulse compression circuit A technique and apparatus for increasing the peak output pulse power of a capacitor driven high-power diode and square-loop saturable reactor pulse compression generator or transmitter (such as a Loran-C transmitter or other high power pulse generator) with the aid ... | 06/20/2006 |
| 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 |
| 7040538 | Bar code reader including linear sensor array and hybrid camera and bar code reader A semiconductor detector device for detecting optical code symbols includes no more than 512 pixels. Each of the pixels has an aspect ratio that is greater than 2 to 1 with a short dimension not greater than 8 microns. In a bar code reader, a sensor for detecting th... | 05/09/2006 |
| 7010025 | Circuit and method for an improved front end in duplex signal communication systems An improved analog front end and methods for increasing the power efficiency of duplex signals on a transmission line are disclosed. The improved analog front end bifurcates a hybrid into a fixed portion and an adaptive portion. The adaptive portion combines a biqua... | 03/07/2006 |
| 6992619 | Use of global positioning satellites (GPS) to discover and select local services A method and an apparatus for associating location information corresponding to a geographic location with information about services available at the geographic location. The information may be stored in a database for subsequent use. ... | 01/31/2006 |
| 6952181 | Locating a mobile station using a plurality of wireless networks and applications therefor A location is disclosed for wireless telecommunication infrastructures. The systems output requested locations of hand sets or mobile stations (MS) based on, e.g., AMPS, NAMPS, CDMA or TDMA communication standards. The system determines both local MS locations, and ... | 10/04/2005 |
| 6940365 | Methods and apparatus for an improved discrete LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ... | 09/06/2005 |
| 6928265 | METHOD OF AND APPARATUS FOR IMPLEMENTING HIGH SPEED DATA COMMUNICATION BY PHASE (FREQUENCY) MODULATION OF LORAN-C NAVIGATION SYSTEM USING SOLID-STATE PULSE TRANSMITTERS AND HIGH-POWER SOLID STATE SWITCHING FOR DYNAMIC ANTENNA TUNING A frequency-hopping intrapulse frequency modulation Loran-C navigation pulse technique, preferably using a flat-topped pulse shape and a novel 16-ary phase hopping scheme, and a novel improved high-power solid-state switch for dynamic antenna modulation tuning. ... | 08/09/2005 |
| 6907255 | Terminal unit, position display method, information providing system, and information providing method A radiocommunication system including a portable terminal, a base station and a server. The portable terminal transmits a destination to the server and further sends the ID number (CS_ID) of the base station coupled through a radio link to the portable terminal. The... | 06/14/2005 |
| 5796366 | Method of and apparatus for position location and tracking of a vehicle or the like by the reception at the vehicle of pulsed radio navigation signals as of the Loran-OC type and the like, with an autonomous loop antenna-receiver This disclosure deals with processing radio-frequency navigation signals, particularly Loran-C signals, from crossed loop antennas (H-field antennas) by shifting the signal phase from two loops to be in quadrature with respect to each other and adding the... | 08/18/1998 |
| 5635940 | Communication configurator and method for implementing same A method and apparatus for communication configuring in digital equipment based on the location of the equipment includes a mechanism determining the location of the digital equipment and a mechanism configuring a communication channel of the equipment ba... | 06/03/1997 |
| 5563611 | Method of and apparatus for integration of Loran-C and satellite navigation system (SNS) technologies for improved system accuracy, availability and integrity A method of apparatus for integrating Loran-C and satellite navigation system technologies in a manner in which the Loran-C navigation signal transmissions are further modulated to provide a communications signal and a supplemental navigation signal, time... | 10/08/1996 |
| 5510800 | Time-of-flight radio location system A bi-static radar configuration measures the direct time-of-flight of a transmitted RF pulse and is capable of measuring this time-of-flight with a jitter on the order of about one pico-second, or about 0.01 inch of free space distance for an electromagne... | 04/23/1996 |
| 5363112 | Noise suppression processor for a carrier tracking loop A noise suppression processor maintains a carrier tracking loop in a receiver in lock in the presence of high noise levels to permit the receiver to measure range changes from a remote transmitter in noisy environments. The noise suppression processor is ... | 11/08/1994 |
| 5311195 | Combined relative and absolute positioning method and apparatus A navigation system comprising a relative positioning system (RPS) with dead reckoning and map matching and an absolute positioning system (APS) is provided and operated in such a manner that APS position information is used for updating RPS position and ... | 05/10/1994 |
| 5278568 | Method of and apparatus for two-way radio communication amongst fixed base and mobile terminal users employing meteor scatter signals for communications inbound from the mobile terminals and outbound from the base terminals via Loran communication signals A method of and apparatus for two-way radio meteor scatter communication amongst mobile transceiver-equipped terminals and fixed meteor scatter base terminal(s) that comprises communicating high volume point-to-point inbound information from the mobile te... | 01/11/1994 |
| 5220333 | Method and apparatus for determining universal coordinated time from Loran-C transmissions A method and apparatus for determining Universal Coordinated Time from Loran-C transmissions at at least two Group Repetition Intervals. With time known to within a few seconds of Universal Coordinated Time, and position known to within approximately five... | 06/15/1993 |
| 5193215 | Location signalling device for automatically placing a radio distress call A location signalling device sends a radio distress call giving the precise location coordinates of a person in distress automatically once it is activated without the need for anyone to operate an associated radio transmitter. The device includes a micro... | 03/09/1993 |
| 5181041 | Accurate location system using transponded and correlated LORAN signals An accurate location system 10 for use in locating the position of a tracked unit 16 having at least a first and a second transmitter 14, 22 for propagating at least first and second signals and a master station 12 for receiving and storing the first and ... | 01/19/1993 |
| 5173690 | Passive ranging system utilizing range tone signals A passive ranging system for determining the slant range from a ground station to a drifting radiosonde. In one embodiment, the ground station receives meteorological data ranging and internal temperature signals from the radiosonde. The data signals are ... | 12/22/1992 |
| 5105196 | Loran-C alignment method An alignment procedure to insure the proper and faithful reproduction of the automatic control loop SERial DAta (SERDA) instructions issued by the Pulse Amplitude and Timing COntrol Unit (PATCO). This reproduction takes place during high level, multipulse... | 04/14/1992 |
| 5032845 | Vehicle locating system with Loran-C The location of a vehicle having an assigned serial number is determined at a location remote from the vehicle with a system including a central master station and plural local networks, each having a local master station in a bi-directional communication... | 07/16/1991 |
| 4999638 | Apparatus and method for synchronizing the signal averaging clock of a Loran C. receiver to the clock of a Loran C. transmitter Radio signals containing Loran C pulses from stations from a desired chain are amplified, filtered and ensembled averaged in an acquisition memory which is accessible by a controlling microprocessor. By staggering the ensemble averaging of the first four ... | 03/12/1991 |
| 4959655 | Method for the radiolocation of a vehicle carrying a receiving device, by measuring the differences between the times for receiving radio-frequency signals, and receiving device for carrying out this method A method and a device for the radiolocation of a vehicle carrying said device, wherein the radiolocation is performed by measuring the differences between the times for receiving radiofrequency signals transmitted by two transmitting stations geographical... | 09/25/1990 |
| 4914436 | Ground proximity approach warning system without landing flap input A ground proximity warning system is disclosed which can recognize when an aircraft is on a final approach to an airport without utilizing a landing flap signal input. Airports together with the surrounding terrain topography are modeled by a simple geome... | 04/03/1990 |
| 4888594 | Loran-C receiver module A Loran-C Receiver Module is provided which utilizes minimum rate sampling means as well as a homodyne receiver at the front end of the Receiver Module to mix down the Loran signal to base band. Once the frequency of the Loran signal is reduced, it is muc... | 12/19/1989 |
| 4833477 | Emergency vessel location system An omega, loran or satellite navigation receiver is provided with a speech synthesizer coupled to its latitude/longitude output which is in turn coupled to a transmitter which transmits the latitude and longitude along with a "mayday" indication on an eme... | 05/23/1989 |
| 4821038 | Method of and apparatus for Loran-C message communication with reduced skywave navigation location errors and the like A Loran-C communications technique and system are disclosed involving appropriate encoding of communication messages and logical multiplication and inversion of encoded signals prior to phase modulation of the Loran-C pulses, with novel bit-flip connectio... | 04/11/1989 |
