Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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 |
| 7353614 | Vehicle compass system with continuous automatic calibration The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One suc... | 04/08/2008 |
| 7315161 | Micro-electromechanical system (MEMS) based current and magnetic field sensor having capacitive sense components A micro-electromechanical system (MEMS) based current & magnetic field sensor includes a MEMS-based magnetic field sensing component having a capacitive magneto-MEMS component, a compensator and an output component for sensing magnetic fields and for providing, in r... | 01/01/2008 |
| 7262522 | Microelectromechanical isolating power converter A microelectromechanical system (MEMS) device is used to transfer power from a source generator to a power generator that delivers electrical power to a load, while maintaining electrical isolation between the source generator and power generator for size critical a... | 08/28/2007 |
| 7236096 | Slope detector In a dump truck where a monitoring system prevents the raising of the cargo bed when the level of lateral tilt exceeds a safe limit, a keyed switch allows for presetting the maximum safe degree of tilt by simple left or right manipulation of the switch, and to switc... | 06/26/2007 |
| 7193409 | Measuring transformer utilizing a reference current A measuring transformer compares a current flowing through a conductor to a reference current. In one embodiment, the measuring transformer includes a magnetic circuit formed by a toroidal core, a conductor through which the current to be measured flows and which is... | 03/20/2007 |
| 7112951 | MEMS based current sensor using magnetic-to-mechanical conversion and reference components A micro-electromechanical system (MEMS) current sensor is described as including a first conductor, a magnetic field shaping component for shaping a magnetic field produced by a current in the first conductor, and a MEMS-based magnetic field sensing component includ... | 09/26/2006 |
| 7082890 | Gauge pointer with integrated shape memory alloy actuator An actuated gauge pointer that includes a shape memory alloy element configured to move the gauge pointer when activated is provided. The actuated gauge pointer includes a first shape memory alloy element disposed within the perimeter of the gauge pointer housing. A... | 08/01/2006 |
| 7057384 | Measuring transformer utilizing a reference current A measuring transformer compares a current flowing through a conductor to a reference current. In one embodiment, the measuring transformer includes a magnetic circuit formed by a toroidal core, a conductor through which the current to be measured flows and which is... | 06/06/2006 |
| 7049806 | Microelectricalmechanical system with improved beam suspension In a MEMS device employing a beam supported by transverse arms, potential bowing of the transverse arms caused by fabrication processes, temperature or local self-heating from resistive losses is accommodated by flexible terminations of the transverse arms. Alternat... | 05/23/2006 |
| 7046539 | Mechanical memory A first-in-first-out (FIFO) microelectromechanical memory apparatus (also termed a mechanical memory) is disclosed. The mechanical memory utilizes a plurality of memory cells, with each memory cell having a beam which can be bowed in either of two directions of curv... | 05/16/2006 |
| 6979872 | Modules integrating MEMS devices with pre-processed electronic circuitry, and methods for fabricating such modules A MEMS module is provided comprising at least one MEMS device adhesively bonded to a substrate or wafer, such as a CMOS die, carrying pre-processed electronic circuitry. The at least one MEMS device, which may comprise a sensor or an actuator, may thus be integrated... | 12/27/2005 |
| 6932893 | System for electrophysiological measurements The present invention relates to a high through-put system for determining and/or monitoring electrophysiological properties of ion channels of ion channel-containing membranes, typically lipid membrane-containing structures such as cells. In particular, the inventi... | 08/23/2005 |
| 6803776 | Current-comparator-based four-terminal resistance bridge for power frequencies A current comparator technique is applied to four-terminal resistance measurements for obtaining a highly accurate AC resistance bridge at power frequencies of 50 Hz to 60 Hz. Active circuits are used to establish equal voltage drops between the potential terminals ... | 10/12/2004 |
| 6803755 | Microelectromechanical system (MEMS) with improved beam suspension In a MEMS device employing a beam supported by transverse arms, potential bowing of the transverse arms caused by fabrication processes, temperature or local self-heating from resistive losses is accommodated by flexible terminations of the transverse arms. Alternat... | 10/12/2004 |
| 6504356 | Microelectro-mechanical high resolution current sensing apparatus A current sensor includes a deflectable member disposed in a magnetic field. Nulling or compensating members may be mechanically coupled to the deflectable member. Feedback or readout devices coupled to the structure provide signals indicative of deflecti... | 01/07/2003 |
| 6466005 | High resolution current sensing apparatus A current sensor includes a deflectable member disposed in a magnetic field. Nulling or compensating members may be mechanically coupled to the deflectable member. Feedback or readout devices coupled to the structure provide signals indicative of deflecti... | 10/15/2002 |
| 6348788 | High resolution current sensing apparatus A current sensor includes a deflectable member disposed in a magnetic field. Nulling or compensating members may be mechanically coupled to the deflectable member. Feedback or readout devices coupled to the structure provide signals indicative of deflecti... | 02/19/2002 |
| 5933003 | Magnetoresistive wheatstone bridge with compensating current conductor for measuring an electric current Measuring devices for determining magnetic fields to be used in particular for the potential-free measurement of the strength of an electric current which generates such a magnetic field. To obviate the need for an intermediate element specially connected... | 08/03/1999 |
| 5933002 | Controlled bending actuator system Controlled bending movement of a flexible elongate rod or filament in response to a bend signal indicative of a desired amount of bending is effected by a strip of shape-changing material disposed on a first side of an elongate rod element, the shape chan... | 08/03/1999 |
| 5831424 | Isolated current sensor An improved isolated current sensing device. The invention consists of two magnetizable cores which surround the conductor carrying the current to be measured. The two cores are cyclically saturated in opposite directions by a high-frequency excitation cu... | 11/03/1998 |
| 5565765 | Current sensor operating according to the compensation theorem A current sensor operating according to the compensation thereon which is particularly suited for acquiring high currents has a secondary winding of the current transformer is divided into at least two sub-windings that are supplied by different amplifier... | 10/15/1996 |
| 5392218 | Electrically isolated approach to sensing dc voltages referenced to a floating ground An analog isolation barrier data acquisition system comprises a plurality of satellite sampling modules which are referenced to remote grounds for sensing direct current (dc) voltages which are referenced to these remote grounds. The satellite sampling mo... | 02/21/1995 |
| 5291073 | Thermal power sensor A thermal power sensor for providing an output signal that is linearly related to the amount of power derived from a power source over a first range and that is square law related to the amount of power derived from a power source over a second range whic... | 03/01/1994 |
| 5153510 | High impedance system for measuring voltage A high voltage measuring system with very high input impedance. The system measures a high voltage source under test by developing a control signal which is proportional to the differential voltage between the high voltage source being tested and an adjus... | 10/06/1992 |
| 5144154 | Range changing using N and P channel FETS A range selecting impedance is switched into or out of a parallel range-selecting network by connecting the impedance across the network through an n-channel and a p-channel FET connected in parallel output configuration. The n-channel FET does the switch... | 09/01/1992 |
| 5132608 | Current measuring method and apparatus therefor A current measuring method in which a magnetic sensor is a torodial core having a conductor for carrying a current to be measured passing through the hollow portion of the toroid. A coil on the core is excited with an AC voltage such that the positive and... | 07/21/1992 |
| 4967145 | Active current transformer An active current transformer has a primary conductor in which a current is to be measured and a secondary conductor in which a measuring current is generated in use. A feedback sensor provides an induced voltage and an amplifier receives a signal induced... | 10/30/1990 |
| 4947108 | Electric current sensing device A magnetic circuit is coupled with a primary conductor in which flows the current to be sensed. The magnetic circuit has at least one air gap with a magnetic field detector and is coupled with at least one measuring coil producing a magnetic flux for comp... | 08/07/1990 |
| 4916570 | Voltage comparator circuit for monitoring a process output voltage within a preset range A fluctuating voltage to be monitored is fed to the non-inverting input of a first op amp via a first input resistor; a reference voltage is fed to the inverting input of the second op amp via a second input resistor. The inverting input of the first op a... | 04/10/1990 |
| 4910455 | Non-intrusive current measuring circuit A current measuring circuit for an integrated circuit comprises an operational amplifier (22), the non-inverting input terminal of which is grounded through a first resistor (23) having a value RB and a second resistor (21) having a value R | 03/20/1990 |
| 4823075 | Current sensor using hall-effect device with feedback A current sensor for use with a conductor with known cross-sectional characteristics is an electronic circuit having a monolithic Hall-effect element disposed substantially perpendicular to the conductor first major surface. A conductive loop substantiall... | 04/18/1989 |
| 4817011 | Automated modeling method for tuning transformers A computer automated method and system is used to time transformers to produce a resonant circuit for matching elements to a circuit is disclosed. The modeling method uses a computer to select discrete values for resistive and capacitive loads to be conne... | 03/28/1989 |
| 4814695 | Measurement method for an electrical signal, series-parallel negative-feedback measuring circuit, as well as use of the method of the measuring circuit for measuring voltage sources with very-high-ohmage internal impedances For measuring voltage sources with capactive internal impedance (ZG) the voltage source is connected to a charge amplifier (7) whose input capacitance comprises a vibrating capacitor (C(t)). The output of charge amplifier (7) is connected in se... | 03/21/1989 |
| 4771233 | Printed curcuit board lead ammeter An ammeter is used for measuring the current flowing through a lead on a printed circuit board having a four point probe contacting the printed wire under test. Each probe points is spring loaded and approximately one millimeter separates adjacent probe p... | 09/13/1988 |
| 4677666 | Adaptive line hybrids An adaptive line hybrid for digital telecommunications including a bridge circuit for connection to the telecommunication line the bridge circuit having automatically adjustable components in two arms of the bridge to compensate for variations in the char... | 06/30/1987 |
| 4639665 | Sensing system for measuring a parameter A parameter, such as the current flowing through a conductor, is measured by initially passing an energizing magnetic flux through a hall element to produce a hall voltage proportional to the sensed parameter. To eliminate temperature, aging and non-linea... | 01/27/1987 |
| 4547728 | RF Wattmeter An RF wattmeter is disclosed of the type using an "insertion-type" pick-up element to produce a voltage wave signal corresponding to the measured power in the coaxial transmission line. The induction loop in the pick-up element is connected to a principal... | 10/15/1985 |
| 4510442 | Measuring system for exceedingly weak currents A precision circuit for measuring electrical currents, of the order of only a few pico-amperes, in the individual ionic channels of biological membranes, comprising a pipette engaging a membrane and having an internal electrode connected to a current-to-v... | 04/09/1985 |
| 4460867 | Method and circuit for measuring of current A method and device for the contactless measuring of direct and alternating current, in particular current instantaneous values, by using a magnetic circuit having an air slot and a magnetic field dependent resistor through which a control current flows a... | 07/17/1984 |
| 4407993 | Hindered piperidine polymer stabilizers N-(ଲ-aminoethyl)-3-hydroxy-1,1,6,6-tetramethyl-piperidine and certain of its N- and O-substituted derivatives are useful as light stabilizers for polymeric materials, particularly for thermoplastic polymers and automotive finishes. Preferred compoun... | 10/04/1983 |
