Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8031119 | Determining the angle of arrival of a target signal received by an array of antenna elements In a system for determining the angle of arrival of a target signal received by an array of antenna elements, a pair of receivers simultaneously obtain observations of a received target signal from multiple elements of an array of antenna elements; and a computer pr... | 10/04/2011 |
| H2224 | Self-calibrating large baseline interferometer formed from two aircraft A method to passively locate an emitter using two aircraft to form a large baseline interferometer. The basic two element (two aircraft or helicopters) large baseline interferometer includes self-calibration and allows for various configurations for geo-location of ... | 10/07/2008 |
| 7427954 | Method and apparatus for direction finding A direction finding system is used in which a number of adjacent bands are sequentially measured in fast rotation, with the results from each of the bands being FFT processed to provide amplitude and phase information on all of the signals existing within the band. ... | 09/23/2008 |
| 7395084 | Dynamic antenna allocation system A communication system with an antenna array having a respective antenna for each of a multitude of communication modules and a control system which seiectiyely reassigns communication over a first of said multitude of communication modules to a second communication... | 07/01/2008 |
| 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 |
| 7342483 | Method for contacting stolen vehicles A method and system for locating a stolen vehicle includes the steps of receiving at least one stolen vehicle input associated with the stolen vehicle at a call center and assigning a first ping rate responsive to the input. An automated request is sent in accordanc... | 03/11/2008 |
| 7292831 | Radio communicate method and system A transmitter 1 transmits from a transmission antenna 7 a mixture signal containing a radio-frequency (RF)-band modulated signal, and a portion of power of a local oscillation signal used for frequency conversion. Meanwhile, a receiver 8 detects... | 11/06/2007 |
| 7277046 | Single transmit multi-receiver modulation radar, multi-modulation receiver and method A single transmit multi-receiver modulation radar modulates radar return signals received through an associated receive-signal path with one of a plurality of differing modulation waveforms having low-cross correlation products. Each receive-signal path may be assoc... | 10/02/2007 |
| 7213442 | Methods of arranging transducers and transducer arrays having reduced phase ambiguity for determining direction of arrival of received signals Method of arranging transducers, including non-coplanar interferometer antennas on the outer surface of an aircraft, to minimize phase ambiguities when determining the direction of arrival of a signal received by an array of the transducers and emitted by a source r... | 05/08/2007 |
| 7170440 | Linear FM radar A FM-CW radar system comprises a frequency modulated continuous wave digital generator that produces both in-phase (I) and quadrature-phase (Q) outputs to orthogonally oriented transmitter antennas. A linearly polarized beam is output from a switched antenna array t... | 01/30/2007 |
| 7148801 | Article locator system A system and method for locating objects such as people, pets, and personal articles is described. A transceiver is attached to the person, animal, or item to be tracked and a handheld locator device is employed to transmit a locator signal containing an address cod... | 12/12/2006 |
| 7130243 | Location finding system, using reflected radio frequency or acoustic signals in a crowded reflector environment A method of locating one or more reflectors in an environment crowded with reflectors. A transmitter and multiple receivers are used to obtain reflected signals. Each path of a reflected signal is defined by an ellipse having the transmitter at one focus and a recei... | 10/31/2006 |
| 7098845 | Apparatus for generating an integrator timing reference from a local oscillator signal A receiver circuit including an oscillator, a mixer coupled to the oscillator, a switch coupled to an output of the mixer, and an envelope detector coupled to the oscillator, such that the envelope detector generates a timing signal for actuating the switch based on... | 08/29/2006 |
| 7047205 | Management of the flow of persons in relation to centers of crowd concentration via priority control A method and system for the loading of patrons at multiple attractions at an entertainment includes the first-in first-out line and a priority based line. A cellular telephone is used to obtain and claim priority status. In other forms different priorities are estab... | 05/16/2006 |
| 6996420 | Radio communication system, mobile terminal unit thereof, and azimuth determining method Disclosed are a mobile station unit which can obtain azimuth information with a simple construction and a radio communication system including the mobile terminal unit. According to the present invention, in a terminal station, an arrival direction obtaining section... | 02/07/2006 |
| 6989789 | Method for locating radioelectric sources using two-channel high resolution radiogoniometer A process for locating radio sources by a two-channel high resolution radiogoniometer including a network of a specified number N of sensors. The process multiplexes the signals supplied by the N sensors on the inputs of only two receivers. Then, with the aid of a c... | 01/24/2006 |
| 6965866 | Product warranty registration system and method A method for obtaining warranty registration of products, facilitating return of lost products, and expediting warranty service on defective products comprising providing a unique identifier on or within each product; providing a lost and found system comprising the... | 11/15/2005 |
| 6952646 | Tracking device and associated system and method A system for tracking a vehicle is provided. Such a system comprises a tracking device including a location-determining apparatus configured to determine a location, a signaling device operably engaged with the location-determining apparatus and adapted to transmit ... | 10/04/2005 |
| 6943682 | Home security administration platform A network may receives tracking information of various emergency services personnel, so that when a security breach has occurred at a residence or place of business, the network receives a surveillance profile from a home computer that is disposed where the detector... | 09/13/2005 |
| H2109 | Passive microwave direction finding with monobit fourier transformation receiver and matrix coupled antenna A passive instantaneous microwave signal frequency identifying and angle of arrival identifying system employing a beam steering multiple element antenna coupled through a Butler matrix to a plurality of simplified Fourier transformation radio receivers wherein unit... | 09/07/2004 |
| 6735524 | Spatially resolved and spatially aware antenna for radio navigation A method and apparatus for radio navigation and location is disclosed. The method uses an autonomous, on-board micro-inertial navigation system to propagate the state of a station, and an angularly resolvable antenna to measure relative orientation and relative rang... | 05/11/2004 |
| 6731955 | Radio communication system, mobile terminal unit thereof, and azimuth determining method Disclosed are a mobile station unit which can obtain azimuth information with a simple construction and a radio communication system including the mobile terminal unit. According to the present invention, in a terminal station, an arrival direction obtaining section... | 05/04/2004 |
| 6727840 | Interference suppression circuit and method thereof for multi-channel receivers The Electronic Support Measure (ESM) system is disclosed having various embodiments all of which reduce or even eliminate the detrimental effects caused by interference signals commonly generated by CW emitters. ... | 04/27/2004 |
| 6700536 | System and method for determining a direction of incident electromagnetic signals A system and method are provided that includes at least a pair of spaced antennas having overlapping fields of view. The system further includes at least a pair of receivers respectively coupled to the pair of antennas. Each of the receivers includes a sp... | 03/02/2004 |
| 6690321 | Multi-sensor target counting and localization system A system is provided for detecting the presence of two or more acoustic sources or targets such as vehicles that are traveling between an array of unattended passive ground sensors, in which the sensors each include a phased-array microphone and processin... | 02/10/2004 |
| 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 |
| 6670920 | System and method for single platform, synthetic aperture geo-location of emitters The determination of the geographical location of a signal emitter by the coherent, time integrated measurement of received signal wavefront phase differences through a synthetic aperture and the reconstruction of the wavefront of the received signal. The... | 12/30/2003 |
| 6639553 | Passive/ranging/tracking processing method for collision avoidance guidance A passive/ranging/tracking processing method provides information from passive sensors and associated tracking control devices and GPS/IMU integrated navigation system, so as to produce three dimensional position and velocity information of a target. The ... | 10/28/2003 |
| 6618009 | Method and apparatus for locating the source of an unknown signal A method of determining the location of an unknown source 10 transmitting a signal to satellite relays 14 and 16 comprises receiving replicas of the signal from the relays at receivers 18. The receivers 18 also transmit and receive reference signals via r... | 09/09/2003 |
| 6388604 | Circuit for LPI signal detection and suppression of conventional pulsed signals A pulse Low Probability of Intercept (LPI) signal discriminator has a soft-limiting IF amplifier chain for receiving an IF signal to soft-limit any high-peak IF signals in the IF signal and a high-peak amplitude compressive circuit followed by an integrat... | 05/14/2002 |
| 6366240 | Location of aircraft with time difference of arrival A system and method for determining the position of an aircraft. An aircraft signal is received by a first antenna and a second antenna, the first antenna being at a known baseline distance from the second antenna. A processor is used to calculate the tim... | 04/02/2002 |
| 6313781 | Simultaneous intrapulse analysis, direction finding and LPI signal detection The present invention relates to multi-function, multi-channel digital receiver architecture for performing three distinct receiver functions including simultaneous intrapulse analysis, direction finding and LPI signal detection; for determining parameter... | 11/06/2001 |
| 6313794 | Method of detection and determining an angular location of frequency agile emitters The present invention uses feedback 300 from RF carrier frequency measurements 301 to disassociate the emitter angle-of-arrival component 313 in the ambiguous phase measurement 312 from the initially unknown phase measurement integer ambiguities 314; to t... | 11/06/2001 |
| 6278406 | Direction finder and device for processing measurement results for the same A direction finder is provided that can measure the incoming angles of plural incoming signals without spatially moving antenna elements and can be used in outdoor mobile communication environments. The direction finder also can shorten the measurement ti... | 08/21/2001 |
| 6255991 | Low cost angle of arrival measurement system An interferometer antenna system (32) for measuring the angle of arrival of RF signals. The interferometer antenna system (32) includes a plurality of interferometer antenna elements (36) coupled to a first switching network (42). The first switching netw... | 07/03/2001 |
| 6239747 | Antenna system and method for direction finding An array antenna for direction-finding includes antenna elements which define a triangular outline well-suited for meeting space constraints or reducing reflections from mounting conditions associated with the array antenna. The actual geometric configura... | 05/29/2001 |
| 6223123 | Method and apparatus for direction finding Two pairs of signals determinative of bearing to a transmitter are developed from two pairs of directional antennas. The signals, converted to digital form, are compared to each other to develop a result signal. The result signal is used to select a prima... | 04/24/2001 |
| 6184829 | Calibration for wireless location system Methods and apparatus for calibrating a Wireless Location System to enable the system to make highly accurate TDOA and FDOA measurements are disclosed. An external calibration method in accordance with the present invention comprises the steps of transmit... | 02/06/2001 |
| 6169519 | TCAS bearing measurement receiver apparatus with phase error compensation method A TCAS receiver, including a relative bearing measurement radio receiving apparatus for use with an antenna array having four antennas where each antenna has associated with it, its own receiver capable of demodulating both I and Q components of transmiss... | 01/02/2001 |
| 6025814 | Antenna unit for the doppler measurement of grain flow An antenna unit for measuring the velocity of a flowing material by the Doppler effect is particularly suited for use where only a limited space is available. The antenna unit comprises a support block having first and second surfaces disposed at an acute... | 02/15/2000 |
