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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 6507113 | Electronic interface structures and methods of fabrication One type of electronic interface structure includes a base; at least one elastomeric island supported by the base; and patterned metallization overlying the at least one elastomeric island and including at least one floating pad at least partially overlyi... | 01/14/2003 |
| 6495940 | Slip ring brush assembly and method An assembly for transferring current comprises at least one electrically conductive slip ring; at least one electrically conductive brush for supplying current to the at least one slip ring; and an electric or pressure actuator driven vibration source for... | 12/17/2002 |
| 6496782 | Electric machine monitoring method and system A machine monitoring method includes obtaining signals indicative of machine conditions, machine rotational speed, direction, and load conditions over a segment of time, transforming the obtained signal indicative of machine conditions into a frequency sp... | 12/17/2002 |
| 6489781 | Method and system for detecting core faults A method for detecting core faults includes: positioning a magnetic yoke near at least one tooth of the core, the magnetic yoke being wound by a winding and comprising two core-facing surfaces and at least one flux sensor situated on at least one of the t... | 12/03/2002 |
| 6469504 | Method and system for detecting core faults A method for detecting core faults includes (a) positioning a magnetic yoke near at least one tooth of the core, the magnetic yoke being wound by a winding; (b) supplying current to the winding to inject magnetic flux into the at least one tooth of the co... | 10/22/2002 |
| 6456947 | Digital current differential system A method of detecting faults on a power transmission line system includes simultaneously measuring phase current samples at each phase of each transmission terminal; calculating real and imaginary phaselets comprising partial sums of the phase current sam... | 09/24/2002 |
| 6445105 | Axial flux machine and method of fabrication An axial flux machine includes a rotatable shaft; at least one rotor disk coupled to the rotatable shaft; at least one permanent magnet supported by the at least one rotor disk; at least one stator extension positioned in parallel with the at least one ro... | 09/03/2002 |
| 6429381 | High density interconnect multichip module stack and fabrication method A method for fabricating a substrate package for a high density interconnect multichip module stack comprises: providing a substrate having holes extending therethrough and having a bottom surface with metallization situated thereon; providing a metal she... | 08/06/2002 |
| 6415169 | Multiple electrode assembly with extendible electrodes and methods of fabrication and application A flexible multiple electrode assembly includes at least one fixed electrode; at least one extendible electrode; and electrically conductive interconnections coupling the at least one fixed electrode and the at least one extendible electrode to a common c... | 07/02/2002 |
| 6412971 | Light source including an array of light emitting semiconductor devices and control method A light source includes a substrate; an array of un-packaged light emitting semiconductor devices (LESDs), each of the LESDs having at least one surface for emitting light and a substrate surface being attached to the substrate; and a plurality of electri... | 07/02/2002 |
| 6405154 | Method and apparatus for power electronics health monitoring A method for monitoring the health of power electronics includes: providing a switch command to a power electronic device (12) through a gate driver (14); measuring a switching time of the power electronic device; and using the switching time to determine... | 06/11/2002 |
| 6396188 | Salient pole synchronous machine rotor including continuously extending end plates A salient pole synchronous machine rotor includes a rotor shaft; a plurality of salient poles concentric to the rotor shaft; and end plates facing opposing ends of the salient poles, each end plate extending continuously around the rotor shaft.... | 05/28/2002 |
| 6396153 | Circuit chip package and fabrication method One method for packaging at least one circuit chip includes: providing an interconnect layer including insulative material having a first side and a second side, initial metallization patterned on second side metallized portions of the second side and not... | 05/28/2002 |
| 6388420 | System and method for sensorless rotor tracking of induction machines A drive system comprises a rotor position and velocity tracker adapted to decouple fundamental frequency effects of a zero sequence signal of an induction machine from the zero sequence signal and to use a resulting error signal to estimate a position and... | 05/14/2002 |
| 6373921 | X-ray unit including electromagnetic shield An X-ray unit includes an X-ray tube including a rotating anode coupled to a rotor and a metal frame enclosing the rotating anode and the rotor. A motor, including the rotor of the X-ray tube, and a stator are situated outside the metal frame while an ele... | 04/16/2002 |
| 6350988 | Optical spectrometer and method for combustion flame temperature determination An optical spectrometer for combustion flame temperature determination includes at least two photodetectors positioned for receiving light from a combustion flame and having different overlapping optical bandwidths for producing respective output signals;... | 02/26/2002 |
| 6345433 | Fabrication method for high speed induction motor rotor An induction motor rotor comprises a rotor shaft, a rotor core, which may be solid or may include a plurality of rotor laminations, having rotor bar slots, a plurality of rotor bars extending through the rotor bar slots, and two rotor end rings brazed to ... | 02/12/2002 |
| 6323096 | Method for fabricating a flexible interconnect film with resistor and capacitor layers A method for fabricating a flexible interconnect film includes applying a resistor layer over one or both surfaces of a dielectric film; applying a metallization layer over the resistor layer with the resistor layer including a material facilitating adhes... | 11/27/2001 |
| 6320294 | Claw pole stator structure A multipole brushless DC motor stator is formed with a pair of complementary opposable claw pole stator structures in which each of the stator structures comprises a stator base formed of a plurality of stacked sheet metal laminations. A plurality of stat... | 11/20/2001 |
| 6311307 | Digital current differential system A method of detecting faults on a power transmission line system includes simultaneously measuring phase current samples at each phase of each transmission terminal; calculating real and imaginary phaselets comprising partial sums of the phase current sam... | 10/30/2001 |
| 6302987 | High voltage polymer processing methods and power feed-through bushing applications A method for coupling electrically conductive bushings in a bus, including alternating layers of dielectric material and patterned, electrically conductive bus bars and having through holes therein with each through hole having a surface exposing a portio... | 10/16/2001 |
| 6298551 | Methods of forming compliant interface structures with partially open interiors for coupling two electrically conductive contact areas An interface includes a surface having an electrically conductive pad; a compliant coating over the surface having a via extending to the pad; metallization patterned over the compliant coating and extending into the via; a low modulus dielectric interfac... | 10/09/2001 |
| 6297459 | Processing low dielectric constant materials for high speed electronics A low dielectric constant printed circuit board includes: a low dielectric constant porous polymer layer having holes therethrough, the porous layer having pores; and a patterned metallization layer over surfaces of the low dielectric constant porous poly... | 10/02/2001 |
| 6285538 | Partial discharge coupler A partial discharge (PD) coupler for coupling electrical machinery to partial discharge analysis testing equipment includes at least one capacitor capable of withstanding high voltages; a current sensor for sensing current passed by the at least one capac... | 09/04/2001 |
| 6281598 | Method and system for predicting incipient failure in a locomotive energy storage unit or energy storage unit cabling One method for predicting incipient failure includes starting an engine of a locomotive; obtaining charge current sample values of the energy storage unit during energy storage unit charging at a predetermined rate for a predetermined period of time; calc... | 08/28/2001 |
| 6281610 | Slip ring brush assembly and method An assembly for transferring current comprises at least one electrically conductive slip ring; at least one electrically conductive brush for supplying current to the at least one slip ring; and an electric or pressure actuator driven vibration source for... | 08/28/2001 |
| 6252304 | Metallized vias with and method of fabrication A method includes applying a first seed layer extending over a horizontal surface and via sidewalls of a dielectric material and exposed underlying contact metallization; removing at least some of the first seed layer from the contact metallization and th... | 06/26/2001 |
| 6248069 | Ultrasound imaging system and method using a quantum well-device for enabling optical interconnections An ultrasound imaging system having an ultrasonic probe including an array of ultrasonic transducers is provided. The imaging system further includes a plurality of interconnect channels for enabling optical communication of the ultrasonic probe with an i... | 06/19/2001 |
| 6236227 | Method and apparatus for turn fault detection in multi-phase AC motors A method for turn fault detection in a multi-phase alternating current machine includes obtaining instantaneous line-to-neutral voltages from each phase of the machine, calculating the sum of the line-to-neutral voltages, and using the sum to determine wh... | 05/22/2001 |
| 6232692 | Sensorless control induction motor rotor slot shapes and fabrication methods A method for fabricating an induction motor rotor lamination includes using an indexed notching die to punch a plurality of closed rotor slots at different distances from a center point of rotation by punching a first rotor slot, changing the position of ... | 05/15/2001 |
| 6229203 | Semiconductor interconnect structure for high temperature applications A circuit module includes at least one high temperature semiconductor chip having chip pads; a substrate having substrate metallization, the chip pads and the substrate metallization being substantially planar; and a deposited flexible pattern of electric... | 05/08/2001 |
| 6198803 | Bearing assembly including rotating element and magnetic bearings A bearing assembly includes: an axial rotatable structure including a cylindrical rotor assembly (including a motor rotor and a plurality of magnetic bearing rotors); a cylindrical stationary shaft; rotating element bearings mechanically coupling the rota... | 03/06/2001 |
| 6199023 | System for removing spurious signatures in motor current signature analysis A method for removing spurious signals in a process of motor current signature analysis of an electric motor (24 or 33) includes creating an electronic model of the motor, acquiring simultaneous measurements of voltage and current at the motor, applying t... | 03/06/2001 |
| 6191458 | Silicon carbide integrated circuits A depletion mode MOSFET and resistor are fabricated as a silicon carbide (SiC) integrated circuit (IC). The SiC IC includes a first SiC layer doped to a first conductivity type and a second SiC layer overlaid on the first SiC layer and doped to a second c... | 02/20/2001 |
| 6180867 | Thermal sensor array and methods of fabrication and use A thermal sensor array includes a dielectric layer including a plurality of individual thermal sensors and a pattern of deposited electrical interconnections facing at least one surface of the dielectric layer for providing electrical connections from eac... | 01/30/2001 |
| 6177237 | High resolution anti-scatter x-ray grid and laser fabrication method A method for fabricating a substantially transparent polymer substrate for an anti-scatter x-ray grid for medical diagnostic radiography includes positioning a phase mask between the substrate and a high power laser; providing a laser beam from the laser;... | 01/23/2001 |
| 6166469 | Method of fabricating a compact bearingless machine drive system A compact bearingless machine drive system includes: a first rotor segment; a first stator segment with the first stator segment including a drive winding and a first control winding; a second rotor segment; a second stator segment with the second stator ... | 12/26/2000 |
| 6160696 | Modular bus bar and switch assembly for traction inverter An electrical power system includes an inverter having a plurality of insulated gate bipolar transistors (IGBTs) and capacitors for converting DC power to AC power and at least one power bus bar including an interconnecting bus bar and a plurality of exte... | 12/12/2000 |
| 6150719 | Amorphous hydrogenated carbon hermetic structure and fabrication method A hard layer of amorphous hydrogenated carbon (DLC) overlies a polymer film structure and a plurality of soft layers of DLC alternate with a plurality of hard layers of DLC over the barrier base to form a corrosion resistant structure. The polymer film st... | 11/21/2000 |
| 6148267 | Method and apparatus for transmission line phase angle comparisons A method for internal fault detection comprises determining whether a local current on a local transmission line terminal exceeds a variable first fault level threshold; if so, determining whether a remote current on a remote transmission line terminal ex... | 11/14/2000 |
