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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 8159344 | Microwave motion detectors utilizing multi-frequency ranging and target angle detection A method of detecting a moving target within a predefined protected region with a microwave motion detector, by transmitting microwave frequency signals and receiving the microwave frequency signals reflected by a target. A target distance is then determined from th... | 04/17/2012 |
| 8138918 | Intrusion detection and tracking system An intrusion detection and tracking system includes a plurality of nodes, a DP and a gateway. The nodes are disposed about an area and form a wireless network to be monitored, the nodes are configured to receive data and transmit data frames with a signal strength i... | 03/20/2012 |
| 8111158 | Intrusion detection system An intrusion detection system includes an intrusion detection device, and a pair of leaky transmission paths including a leaky transmission path of a sending side which is connected to the intrusion detection device and outputs a leaky electric wave on the basis of ... | 02/07/2012 |
| 8077034 | Sensor for presence detection The invention refers to a sensor (10) for presence detection, and a method for presence detection, in a detection area (18) comprising at least an image generator (14) for generating an image on a detection area (18) formed by illuminated... | 12/13/2011 |
| 8018339 | Intruder detection system An intruder detection system is provided in which a detection range can be set to a predetermined one so that false detection caused by a moving object outside the predetermined range can be diminished. The system includes a transmission-side leaky transmission line... | 09/13/2011 |
| 8009044 | Motion detector having asymmetric zones for determining direction of movement and method therefore A detector, system including a detector and method for sensing motion within a detection region. The detector has a detection element and a focusing element aiming received energy corresponding to a presence within the detection region toward the detection element. ... | 08/30/2011 |
| 7994912 | Intrusion-object detection system, method of detecting intrusion-object and method of detecting malfunction A method determining a malfunction when a reception signal fluctuates at a receiver owing to malfunctions occurring on a leaky cable and its related devices. The method determines, among range bins correlating the reception signal with a distance from a feed end of ... | 08/09/2011 |
| 7978071 | Device and method for detecting the presence of an object A device for detecting the presence of an object in a detection zone is provided. The device includes a transmission line, a generator which is connected to an input of the transmission line and which is able to generate an input signal, and a receiver which is conn... | 07/12/2011 |
| 7902979 | Directed energy beam virtual fence There is disclosed apparatus and methods for a directed energy beam virtual fence. The directed energy beam virtual fence may include a source unit to provide an energy beam and a sequence of relay units disposed at intervals along the length of the virtual fence. E... | 03/08/2011 |
| 7830254 | Screening checkpoint for passengers and baggage An advanced technology screening checkpoint system includes a baggage screening zone, a passenger screening zone, and a secondary screening zone. The baggage screening zone may include an explosives scanning system and an imaging system, while the passenger screenin... | 11/09/2010 |
| 7812723 | Intruder detection system An intruder detection system includes a leaky transmission path of a transmission side and a leaky transmission path of a receiving side, both of which has a plurality of leaky points existing in a direction to which the respective leaky transmission path extends, a... | 10/12/2010 |
| 7796032 | Vehicle activated millimeter-wave interrogating An interrogating system can include an interrogating apparatus configured to transmit toward and receive from a subject in a subject position, millimeter-wave electromagnetic radiation. Such a system can also include a controller configured to operate the interrogat... | 09/14/2010 |
| 7760088 | Intrusion detection sensor According to an embodiment, an intrusion detection sensor includes a microwave sensor (120) that transmits microwaves toward a detection area, receives the microwaves reflected by an object present in the detection area, and outputs a reflected wave reception... | 07/20/2010 |
| 7705730 | System and method for improving microwave detector performance using ranging microwave function Embodiments of the present invention are directed to a method and system for use of ranging MW to decrease MW intrusion detector false alarms. A Doppler microwave system may be provided that is capable of detecting an object range and adjusting the sensitivity of an... | 04/27/2010 |
| 7701337 | Hybrid-technology metal detector A hybrid-technology metal detector, using pulse-induction and sine-wave excitation of the transmitter coil alternately, in rapid succession. The energy stored in the transmitter coil, in the pulsed mode, is used to shock-excite a high-Q circuit formed by the ... | 04/20/2010 |
| 7675416 | Intruder detection device The intruder detection device for deciding the occurrence of an invasion if an electric wave, which is received by a leakage transfer passage on the receiving side juxtaposed to a leakage transfer passage on the transmitting side for receiving a leakage electric wav... | 03/09/2010 |
| 7619516 | Single and multi-trace omnidirectional sonde and line locators and transmitter used therewith At least one antenna array including three mutually orthogonal antennas each sharing a common center point senses an electromagnetic signal emitted by a buried object such as a utility line, pipe or sonde. A circuit at least partially mounted in a housing is connect... | 11/17/2009 |
| 7579949 | Anti-theft system and container safeguarded by the same An anti-theft system includes a detecting device, a processing unit, and an alarm unit. The detecting device includes a first detecting unit that is operable so as to transmit a first signal, and a second detecting unit that transmits a second signal to the first de... | 08/25/2009 |
| 7576648 | Cable guided intrusion detection sensor, system and method The present invention provides an intrusion detecting system and method for precisely locating an intruder along the length of a sensor cable and for determining the intruder distance from the cable to precisely locate multiple, simultaneously occurring intrusions. ... | 08/18/2009 |
| 7495556 | Sensor for use with automatic doors The present invention relates to a sensor (8) for use with an automatic door comprising at least two detectors (10, 12) based on different technologies, a processor (14) for processing the signals generated by at least two detectors (10, 12 | 02/24/2009 |
| 7456739 | Approach detecting system A leaky cable having radiation directivity which varies with frequency transmits electric waves in different frequency bands. A measurement apparatus outputs measurement information including signal intensity and phase of a reflected electric wave in each frequency ... | 11/25/2008 |
| 7456740 | Detector device The present invention relates to a detector device and, more particularly, to a detector device comprising a self-diagnosis means for monitoring the correct performance or otherwise of the device. During testing, the device, which normally operates using the Doppler... | 11/25/2008 |
| 7443290 | Communication system The apparatus enhances the degree of freedom in communication using a quasi-electrostatic field. A card device 3 (a ticket checking and collecting machine 2) side in a communication system 1, a quasi-electrostatic field according to an identific... | 10/28/2008 |
| 7438438 | Decorative lighting fixture with adjustable range motion detector A motion-activated decorative lighting fixture with a PIR motion detector having an adjustable field of view hidden behind a decorative slotted wall of the fixture body. The lighting fixture includes a motion detector housing that forms an integral part of the fixtu... | 10/21/2008 |
| 7440620 | Infrared safety systems and methods The present invention relates to an automated safety system having at least one projector to direct electromagnetic energy into a region of space associated with a security, warning, or safety zone. A detector or detectors senses an interruption of the electromagnet... | 10/21/2008 |
| 7414530 | Monitoring circuit for a door The present application describes a monitoring circuit for an aircraft. The monitoring circuit comprises an inductive system, wherein the inductive system comprises a multitude of air core inductors and capacitors. Depending on the distance between a target and the ... | 08/19/2008 |
| 7358888 | System and method for intrusion detection using a time domain radar array A system and method for highly selective intrusion detection using a sparse array of time modulated ultra wideband (TM-UWB) radars. Two or more TM-UWB radars are arranged in a sparse array around the perimeter of a building. Each TM-UWB radar transmits ultra wideban... | 04/15/2008 |
| 7353576 | Methods for forming barbed tape product A system and method for producing a barbed taped product is controlled by an electronic controller to provide a predetermined pattern of attachment points. The system automatically clips adjacent loops of product strands together in the predetermined pattern. The sy... | 04/08/2008 |
| 7346935 | Stretchable high friction socks A woven sock body having a multitude of high friction dots defining friction buttons arrayed around the bottom thereof. ... | 03/25/2008 |
| 7342493 | Motion detector According to various illustrative embodiments, a motion-monitoring system comprises at least one antenna fixed within a barrier, the at least one antenna transmitting at least one first radio-frequency signal through the barrier to at least one volume outside the ba... | 03/11/2008 |
| 7334485 | System, method and computer-readable medium for locating physical phenomena A method, system and computer product for detecting the location of a deformation of a structure includes baselining a defined energy transmitting characteristic for each of the plurality of laterally adjacent conductors attached to the structure. Each of the plural... | 02/26/2008 |
| 7331568 | Apparatus for use with coiled barrier material Apparatus for dispensing coiled barb tape which includes a frame in which is located a boom from which the coiled barb tape is suspended. The boom is extensible to assist in deployment of the barb tape and the frame, apart from protecting the coiled barb tape, provi... | 02/19/2008 |
| 7330123 | Sonar based drowning monitor Low-cost, reliable, easy to use device and method identifies potential drowning or near-drowning events (i.e. a submerged inert human) in a timely manner, provides the precise location of the event, and issues an alert that such an event is in progress. Device is op... | 02/12/2008 |
| 7325787 | Barrier A barrier formed from one or more barrier tapes, which may be barbed. Two lower barrier tapes are supported on the opposed projecting arms of outrigger system installed atop a structure such as a wall, gate or fence. Each extended lower barrier tape is formed from l... | 02/05/2008 |
| 7323985 | Electronic warning system and method The invention provides an electronic warning system, including an electrical line of a fence extending along a protected area; a pulser; a transmitter for transmitting pulses through the line; a receiver for receiving the pulses after being transmitted along at leas... | 01/29/2008 |
| 7317390 | Screening checkpoint for passengers and baggage An advanced technology screening checkpoint system includes a baggage screening zone, a passenger screening zone, and a secondary screening zone. The baggage screening zone may include an explosives scanning system and an imaging system, while the passenger screenin... | 01/08/2008 |
| 7301496 | Radar apparatus In an FM-CW radar apparatus which determines the azimuth to a target by a phase monopulse technique, an abnormal value resulting from the presence of multiple targets is detected. Three receiving antennas are arranged at spacings of 5λ/4 and 6λ/4, respectively, an... | 11/27/2007 |
| 7301457 | Security system and perimeter beam tower A solar powered perimeter beam security system comprising a plurality of spaced towers. The towers have detection beams extending between them for detecting an intruder when at least one of the detection beams is interrupted. Each of the towers communicates with a r... | 11/27/2007 |
| 7298255 | Sensory systems employing non-uniformly spaced waveguide sensors for determining orientation and rotational speed of objects A sensory system for determining the orientation of an object, wherein the sensory system includes a plurality of non-uniformly spaced waveguide sensors or array(s) of waveguide sensors. The non-uniformly spaced waveguide sensors are responsive to received radio fre... | 11/20/2007 |
| 7295109 | Monitoring system The monitoring system has a monitoring apparatus and an access point that wirelessly communicates with the monitoring apparatus. The monitoring apparatus sends a wireless signal to the access point. The access point generates a Received Signal Strength Indicator of ... | 11/13/2007 |
