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| Number | Title | Issue Date |
| 6735801 | Mattress A mattress having a head end and a foot end comprises a first support section configured to support an occupant's feet, legs, and seat, and a second support section located adjacent the head end of the mattress to support an occupant's back and head. A portion of th... | 05/18/2004 |
| 6488588 | Constant velocity universal joint The constant velocity universal joint comprises an outer joint member 1 that has three curved guide grooves 1b formed in the axial direction on a spherical inner circumferential surface 1a thereof, an inner joint member 2 that has three curved guide groov... | 12/03/2002 |
| 6483328 | Probe card for probing wafers with raised contact elements A probe card is provided for contacting an electric componet with raised contact elements. In particular, the present invention is useful for contacting a semiconductor wafer with resilient contact elements, such as springs. A probe card is designed to ha... | 11/19/2002 |
| 6452401 | Charged particle analysis A detection device for analyzing charged particles. The charged particle analyzer comprises a source of charged particles and a charged particle detector spaced from the source and immersed within the source in an ionizable gas. The detector comprises at ... | 09/17/2002 |
| 6437554 | High current measurement system incorporating an air-core transducer An air-core current transducer measurement system is provided for measuring current flow in a high voltage transmission line. The system includes a high voltage end including an electrically conductive case for the circuitry at that end and an isolated lo... | 08/20/2002 |
| 6429673 | Printed wiring board inspection apparatus The pneumatic cylinder is fixed on between the lower member of the upper unit and the lower member of the lower unit. As the shaft of the pneumatic cylinder extends, the upper unit starts lowering by its own weight at first. When the upper unit reaches to... | 08/06/2002 |
| 6429661 | Fault indicator for three-phase sheathed cable A fault indicator for three phase sheathed cables includes a flexible collar unit which fits over the cable. Magnetic pole pieces within the collar unit having associated magnetic windings are aligned with the three conductors within the cable to produce ... | 08/06/2002 |
| 6404204 | Sensor and sensor system for liquid conductivity, temperature and depth Liquid conductivity and temperature are measured in respective sensitivity fields that are collocated--i. e., in volumes that nearly match by mathematical, geometrical, or functional criteria. Collocation is as distinct from mere adjacency or proximity; a... | 06/11/2002 |
| 6404220 | IC testing method and IC testing device using the same In an IC testing apparatus which executes a function test and a DC test, a resistor having a high resistance is connected to the output side of a DC tester such that the connection of the resistor allows a function test to operate normally if the DC teste... | 06/11/2002 |
| 6392422 | Monitoring insulation and fault current in an A/C current network to provide load shutoff whenever differential current exceeds a certain response value A method and device for monitoring insulation and fault current in an electrical alternating current network. The differential current formed by vectorial addition is detected between at least two network conductors. Load-cut occurs when the differential ... | 05/21/2002 |
| 6392400 | High linearity, low offset interface for Hall effect devices A Hall effect sensor or device may be used in a variety of embodiments, such as measuring current within an associated conductor by helping to measure flux density within a gap of a ferromagnetic power meter core, such as in a power meter. A high linearit... | 05/21/2002 |
| 6388947 | Multi-crosswell profile 3D imaging and method Characterizing the value of a particular property, for example, seismic velocity, of a subsurface region of ground is described. In one aspect, the value of the particular property is represented using at least one continuous analytic function such as a C... | 05/14/2002 |
| 6380747 | Methods for processing, optimization, calibration and display of measured dielectrometry signals using property estimation grids A method is disclosed for processing, optimization, calibration, and display of measured dielectrometry signals. A property estimator is coupled by way of instrumentation to an electrode structure and translates sensed electromagnetic responses into estim... | 04/30/2002 |
| 6380746 | Monitoring fluid condition with a spiral electrode configuration A plug for insertion through the wall of a vessel filled with fluid to be monitored has an extension immersed in the fluid which has a pair of wire electrodes helically wound thereon in spaced arrangement. The electrodes are wound at a uniform pitch in on... | 04/30/2002 |
| 6380745 | Electrical geophysical apparatus for determining the density of porous materials and establishing geo-electric constants of porous material The invention includes an apparatus for determining geo-electric data and the density of a porous material. A resistivity-measuring device applies an electrical current through an electrode array to that is part of a non-electrical conductive test cell th... | 04/30/2002 |
| 6380729 | Testing integrated circuit dice A method for testing a plurality of integrated circuits. In one embodiment, a plurality of integrated circuits are arranged on a wafer. The integrated circuits are separated on the wafer across the boundary region. Testing interconnects are disposed acros... | 04/30/2002 |
| 6377058 | Device and method for measuring hay bale moisture A device for sensing moisture in moving hay bales has a pair of star-shaped wheels situated to have points penetrate into the bale and be driven by the bale. The points establish electrode surfaces within the bale between which resistivity or conductivity... | 04/23/2002 |
| 6377051 | Relay test set using computer controlled voltage supply to stimulate both voltage and current transformers A relay test set of reduced size and weight includes a small, highly efficient voltage and current source. The test set incorporates a Class D switching amplifier design that greatly reduces the size of the power source needed to inject the correct voltag... | 04/23/2002 |
| 6377052 | Monitoring fluid condition through an aperture A method for real time monitoring fluid in a vessel with a probe having a pair of electrodes immersed in the fluid. The disclosed probe has the electrodes arranged helically on a rod, sized and configured for insertion in an engine dipstick hole. Preferab... | 04/23/2002 |
| 6377035 | Method of detecting an abrupt variation in an electrical alternating quantity A method of detecting an abrupt variation in a periodic electrical quantity, where a criterion for the occurrence of the abrupt variation is formed from samples of the periodic quantity. To be able to carry out such a method in such a way that the abrupt ... | 04/23/2002 |
| 6373235 | Apparatus and method for determining the position and motion of an object and for precise measurement of phase-related values In one embodiment, a high-resolution measurement apparatus and method determine the position and motion of an object such as a human hand relative to a sensor array. Capacitance transferred to the array by the object within a sensor field produces minute ... | 04/16/2002 |
| 6373269 | Circuit board particularly adapted for use with high density test point in-circuit testers An interface circuit board (20) for high test point density electronic testing equipment has a first thickness signal portion (20c) in which all the signal traces (20e) are routed and a second, thicker integrally formed transfer portion (20d) which transf... | 04/16/2002 |
| 6369588 | Sensor system for web inspection A system for electrically measuring variations over a flexible web has a capacitive sensor including spaced electrically conductive, transmit and receive electrodes mounted on a flexible substrate. The sensor is held against a flexible web with sufficient... | 04/09/2002 |
| 6366074 | Unidirectionality in electronic circuits through feedback A method for creating signal unidirectionality in electronic circuits is disclosed. This invention describes a method for achieving unidirectionality in an electronic circuit with an input side having a signal source and an output side with a load compris... | 04/02/2002 |
| 6366076 | Device with wide passband for measuring electric current intensity in a conductor The current to be measured (I) passes in a conductor (1) enclosed with a Rogowski coil (4) and in the proximity thereof are arranged several magnetic field detectors (3). The sum of the signals from these detectors, formed in the device (2), and the signa... | 04/02/2002 |
| 6366098 | Test structure, integrated circuit, and test method A test structure includes a single current-measuring means for measuring current between a supply terminal and ground, and first and second branches for measuring capacitance between first and second metal lines. The first branch includes a first switch c... | 04/02/2002 |
| 6362627 | Voltage measuring instrument with flying capacitor The voltage measuring apparatus of the present invention comprises: a capacitor configured of a plurality of capacitor elements and divided at a connection point into two sections of the same capacitance; a first switching device for connecting a voltage ... | 03/26/2002 |
| 6362642 | Method of chip testing of chip leads constrained in dielectric media The present invention relates to methods of testing a chip package wherein contact to chip leads is made by a configuration of testing probes in such a manner so as to allow for shorter, tighter-pitch, and more robust chip leads that will not short out in... | 03/26/2002 |
| 6362628 | Arc fault circuit detector device detecting pulse width modulation of arc noise An arc fault detecting circuit using a pulse width modulation, or PWM, technique is used to sense series or parallel arc faults. When arc faults occur, typically an arc step in current is followed by broad band arc noise which is caused by the random fluc... | 03/26/2002 |
| 6362639 | Compliant contactor for testing semiconductors A compliant contactor interfaces a semiconductor device under test with a tester. The compliant contactor accepts a variety of different sized semiconductor devices along with a variety of different pinouts of the semiconductor devices. The compliant cont... | 03/26/2002 |
| 6362643 | Apparatus and method for testing driving circuit in liquid crystal display A driving circuit testing method that can quickly perform a test of a driving circuit in a liquid crystal display and repair defects thereof applies a test signal in parallel to a plurality of gate lines and a start signal to a first gate driving cell. Th... | 03/26/2002 |
| 6359450 | System for checking the resistance of a load connected to a transformer An arrangement that can be implemented with a simple circuit includes a measuring resistance that can either be connected in addition to a load or connected in place of the load. Furthermore, elements are provided that record the change in resistance resu... | 03/19/2002 |
| 6359445 | Microwave sensor for determining position for displacement of a movable part, such as a valve needle The microwave sensor produces an electrical output signal according to a position or displacement of a movable mechanical part (2), especially a valve needle in an injector valve for injecting fuel into an internal combustion engine. This position or disp... | 03/19/2002 |
| 6359444 | Remote resonant-circuit analyte sensing apparatus with sensing structure and associated method of sensing A resonant sensing apparatus for operative arrangement within a test environment to sense an analyte. A sensing structure is included having an antenna in electrical communication with a resonant circuit and a structural element made of a material that se... | 03/19/2002 |
| 6359453 | Vertical probe card for attachment within a central corridor of a magnetic field generator A vertical probe card assembly containing a plurality of vertical probe cards is mounted within a central corridor or opening within a magnetic field generator. Each of the vertical probe cards has a multiplicity of probe needles extending downwardly ther... | 03/19/2002 |
| 6356067 | Wide band signal analyzer with wide band and narrow band signal processors A wide band signal analyzer includes a frequency converter for converting a signal under test to an intermediate frequency signal. A narrow band signal processor receives the intermediate frequency signal and produces a first digital signal representing a... | 03/12/2002 |
| 6356094 | Automated multi-chip module handler, method of module handling, and module magazine An automated method of handling multi-chip modules (MCMs) in conjunction with automated module testing. The method includes providing a plurality of MCMs in a magazine at an input location and positively displacing the magazine through an indexing device.... | 03/12/2002 |
| 6356097 | Capacitive probe for in situ measurement of wafer DC bias voltage A method and apparatus for estimating voltage on a wafer located in a process chamber. A probe, embedded in a wall of the process chamber, detects voltage levels generated by a plasma within the process chamber. A relationship between the detected plasma ... | 03/12/2002 |
| 6353321 | Uncompensated electromagnetic wave resistivity tool for bed boundary detection and invasion profiling A resistivity tool and associated method include measuring the phase shift of an electromagnetic signal at different locations. Preferably, this is accomplished by a resistivity tool having three receivers. The difference of the phase shifts at the differ... | 03/05/2002 |
| 6353324 | Electronic circuit The present invention relates to an electronic circuit and an array of such circuits for precisely measuring small amounts or small changes in the amount of charge, voltage, or electrical currents. One embodiment of the present invention provides an elect... | 03/05/2002 |
