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President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 8174434 | Method and device for determining a distance to a target object An apparatus and a method for determining a distance (r) to a target object (200) proposes transmitting electromagnetic waves in the form of a transmission signal (120a) by a transmitter (111a), receiving at least one part of said ... | 05/08/2012 |
| 8094061 | Multiband transceiver and positioning system using the transceiver The present invention comprising: a first local oscillator for generating a first frequency; a second local oscillator for generating a second frequency; phase-difference setting means for setting a first phase difference between a transmission signal and an output ... | 01/10/2012 |
| 7903022 | Distance measuring apparatus, distance measuring method, reflector, and communication system A transmission controller 7B is configured to transmit an R/W request signal for requesting transmission of a tag response signal to a RFID tag 1 twice. At this time, a frequency controller 7A controls a PLL section 5A to transmit the R/W... | 03/08/2011 |
| 7864105 | Distance measuring apparatus and distance measuring method Distance measuring apparatus has a rough distance measuring circuit (18) using a time delay circuit and a precise distance measuring circuit (31) for measuring the orientation of the vector of a carrier wave to determine the distance, the sum of which ... | 01/04/2011 |
| 7649491 | Distance measuring apparatus, distance measuring method, reflector and communication system A transmission controller 7B is configured to transmit an R/W request signal for requesting transmission of a tag response signal to a RFID tag 1 twice. At this time, a frequency controller 7A controls a PLL section 5A to transmit the R/W... | 01/19/2010 |
| 7589665 | Multistatic method and device for radar measuring a close distance A multistatic detection device for measuring a distance to an object includes a transmitter and a receiver, each having a high-frequency oscillator and a pulse generator. The pulse generators can be supplied with synchronisation signals emitted by signals generators... | 09/15/2009 |
| 7535407 | Apparatus using continuous-wave radiation for detecting and locating targets hidden behind a surface Continuous-wave radiation is used to detect a target hidden behind a surface. In an embodiment, a transmitter directs a beam of continuous-wave microwave radiation from a transmitting location, and reflected radiation from the target is received at first and second ... | 05/19/2009 |
| 7414571 | Low frequency asset tag tracking system and method An apparatus and method for low frequency asset tracking includes a low frequency transmitter tag associated with a cargo container or other high value commodity, a plurality of receivers that detect low frequency signals, and a microprocessor that uses algorithms a... | 08/19/2008 |
| 7391505 | Range sensing system The invention relates to a solid-state range sensing system. As with previous solid-state range sensing systems, an energy source is activated and deactivated in a cyclic pattern with a selected source frequency. A receiver is adapted to sense the reflection of emit... | 06/24/2008 |
| 7388655 | High-precision laser rangefinder using burst emission The present invention provides a rangefinder that has a light source for outputting a measuring beam, an AM modulation unit that modulates the measuring beam with a modulation signal, a light receiving unit that detects a reflected beam that is part of the modulated... | 06/17/2008 |
| 7362260 | Method of using continuous-wave radiation for detecting and locating targets hidden behind a surface Continuous-wave radiation is used to detect a target hidden behind a surface. In an embodiment, a transmitter directs a beam of continuous-wave microwave radiation from a transmitting location, and reflected radiation from the target is received at first and second ... | 04/22/2008 |
| 7362258 | Transponder detection system using radio and light wave signals A target object detection system for detecting a target object using a detector and a tag on the target object; the tag includes a radio wave receiver receiving radio wave from the detector; a light receiver receiving a light signal from the detector; a receipt sign... | 04/22/2008 |
| 7363177 | Apparatus and method for performing the time delay estimation of signals propagating through an environment A system and method for increasing the accuracy of time delay estimates of signals propagating through an environment. The system includes one or more sensors for receiving a plurality of signals, and a time delay estimator for measuring time delays between multiple... | 04/22/2008 |
| 7355545 | Through the wall ranging with triangulation using multiple spaced apart radars A plurality of multi-tone CW radars are used to generate a swath of ranges to a moving object or individual behind a wall or building structure in which the overlap of the range swaths from spaced-apart radars determines the location of the moving object or individu... | 04/08/2008 |
| 7352320 | FM-CW radar An FM-CW radar includes a transmitting section, a mixing section, an A/D conversion section, a storage unit, and a signal processing section. The transmitting section transmits a continuous wave frequency-modulated with a triangular wave. The mixing section mixes th... | 04/01/2008 |
| 7340345 | Method and circuit arrangement for determining a quality level of phase signals The present invention relates to a method and a circuit arrangement for evaluating phase signals for determining an angle or a path of a linearly or rotationally displaced component, whereby a number (N) of measured phase values (α), produced by scanning at ... | 03/04/2008 |
| 7333046 | System and method for monitoring targets A system comprising a moving radar, a processing device, and a phase difference determination device is used to monitor a target. The moving radar has first and second phase centers that transmit and receive signals normal to a direction of movement of the radar. Th... | 02/19/2008 |
| 7330148 | Measuring apparatus and measuring method A measuring apparatus for measuring a distance from an object to be measured has, a transmitting means for alternately modulating amplitudes of a first continuous wave having a first frequency and a second continuous wave having a second frequency for transmitting a... | 02/12/2008 |
| 7327308 | Programmable method and test device for generating target for FMCW radar A test device for a frequency modulated continuous wave (FMCW) radar is provided. The test device has a central control unit for monitoring the FMCW radar. When the FMCW radar transmits a frequency modulated continuous signal to search for a target, the central cont... | 02/05/2008 |
| 7304609 | Hybrid wireless ranging system and associated methods A wireless ranging system includes a first wireless unit and a second wireless unit spaced therefrom. The first wireless unit may include a time-of-arrival (TOA) wireless transmitter, and a near-field electromagnetic (NFE) wireless transmitter having a settable oper... | 12/04/2007 |
| 7295147 | Sensor arrangement and method for regulating the distance of motor vehicles A sensor system on motor vehicles for locating objects in front of the vehicle, wherein at least two sensors, each having a locating depth of at least 50 m, are arranged in such a way on both sides of longitudinal center axis of the vehicle that their locating angul... | 11/13/2007 |
| 7295150 | Methods and systems for identifying high-quality phase angle measurements in an interferometric radar system A method for determining a mechanical angle to a radar target utilizing a multiple antenna radar altimeter is described. The method comprises receiving radar return signals at the multiple antennas, populating an ambiguity resolution matrix with the electrical phase... | 11/13/2007 |
| 7286798 | Electronic shelf label An electronic shelf label with a modulated backscatter communication system which can actively transmit signals. The electronic shelf label includes a modulated backscatter receiver for receiving a first modulated radio frequency (RF) carrier signal, and a transmitt... | 10/23/2007 |
| 7283096 | Microstrip patch antenna for high temperature environments A patch antenna for operation within a high temperature environment. The patent antenna typically includes an antenna radiating element, a housing and a microwave transmission medium, such as a high temperature microwave cable. The antenna radiating element typicall... | 10/16/2007 |
| 7277052 | Method for the multistatic detection and locating of a mobile craft through the use of digital broadcasting transmitters A method to detect and/or locate a mobile craft in a reception system making use of transmitters of opportunity, whose signal comprises elements enabling the synchronization of the receiver, wherein certain discriminating sequences are detected of the payload signal... | 10/02/2007 |
| 7274167 | Position-recognizing system for self-moving robot Disclosed is a position-recognizing system of a self-moving robot. A position-recognizing system of a self-moving robot includes: a floor in which a magnet is inserted; and a self-moving robot provided with a magnetic sensor that can sense the magnet while the robot... | 09/25/2007 |
| 7239580 | Noise adaptive sonar signal processor A system and method of performing sonar range estimations in a noisy sonar environment. The system includes a sensor, a transmitter, a receiver, a plurality of band-pass filters, a cross correlator, and a data analyzer. The transmitter transmits a pulse through a tr... | 07/03/2007 |
| 7236124 | Radar system and method for reducing clutter in a high-clutter environment A radar system transmits an environment-sensing pulse and processing circuitry time-reverses an order of radar return samples and generates a convolution matrix from the radar return samples resulting from a transmission of the environment-sensing pulse. The process... | 06/26/2007 |
| 7224349 | Electronic apparatus The invention efficiently decreases EMI noise occurring with regard to the entirety of an electronic apparatus with a plurality of clocks as references for the operations. The spread spectrum is applied to the clock used by the largest number of ICs, that is, a disp... | 05/29/2007 |
| 7224712 | Interrogator and tag of wireless communication system In a wireless communication system including at least one Interrogator and a plurality of Tags, the Interrogator transmits a main carrier signal, and each Tag transmits a reflected signal to the Interrogator in response to reception of the main carrier signal. The T... | 05/29/2007 |
| 7221278 | RFID verifier An RFID verifier includes a transmit signal strength indicator (TSSI) and a receive signal strength indicator (RSSI). Using the TSSI, the RFID verifier may determine the amount of power an interrogated RFID tag is illuminated with. Similarly, using the RSSI, the RFI... | 05/22/2007 |
| 7221968 | Dedicated short-range communication apparatus for motor vehicle An on-vehicle DSRC apparatus includes a main body (11) a signal processing unit provided in the main body (11), an external storage medium insertion slot (12), an antenna array (22) electrically connected to the signal processing unit to ... | 05/22/2007 |
| 7215252 | Proximity sensor A proximity sensor includes an antenna having a resonant frequency selected to correspond to a resonant frequency associated with a selected dimension of an item of interest. In one example, the antenna is selected to have a resonant frequency corresponding to a res... | 05/08/2007 |
| 7205931 | Method for determining the distance between a base station and a mobile object, in addition to a base station and identification system for a method of this type A method for determining the distance between a base station (SLG) and a mobile object (DT1–DT3). A HF carrier frequency and an offset frequency (df) are predetermined for a QAM modulation. The HF carrier frequency is increased and decreased by the o... | 04/17/2007 |
| 7202941 | Apparatus for high accuracy distance and velocity measurement and methods thereof A system and method for measuring a parameter of a target in accordance with embodiments of the present invention includes transmitting at least one signal towards a target and receiving at least a portion of the transmitted signal back from the target. The measured... | 04/10/2007 |
| 7184458 | Reduced subset scan and dual frequency wakeup for bluetooth inquiry operation An inquiry message is transmitted successively on each of a first plurality of transmit frequencies (44–48) and thereafter successively on each of a second plurality of transmit frequencies (51), in order to ensure that a first wireless communication... | 02/27/2007 |
| 7167126 | Radar system and method for determining the height of an object System and method for determining the height of an object reflecting a real beam radar signal by receiving the reflected signal with a first and second vertically spaced antennas. Receivers provide two signals indicating the phase of the reflected signals received b... | 01/23/2007 |
| 7151454 | Systems and methods for location of objects Systems and methods that may be employed to visually locate and/or track objects equipped with active RFID tags. The disclosed systems and methods may employ an articulated camera/s, such as closed circuit television (“CCTV”) or other suitable type of articulate... | 12/19/2006 |
| 7151979 | System and method for tracking inventory An RFID enabled paper roll includes a tubular core, a paper stock wound around the core, and a radio frequency integrated circuit electrically coupled to an antenna and positioned on the core. A system for reading a radio frequency integrated circuit positioned on a... | 12/19/2006 |
| 7145349 | Method for increasing the interference resistance of a time frame reflectometer and a circuit device of implementing said method The invention relates to methods and a circuit for increasing the interference resistance of a time frame reflectometer, in particular with respect to high frequency irradiation. A transmitted pulse (XS) is generated at a pulse repeater frequency (fprf) and coupled ... | 12/05/2006 |