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Class Information
Number: 324/248
Name: Electricity: measuring and testing > Magnetic > Magnetometers > Superconductive magnetometers
Description: Subject matter wherein the apparatus to sense and indicate the sensing of a magnetic field includes a sensor of the magnetic field or a magnetic shield for the apparatus to sense a magnetic field made of a material which has nearly zero resistance in one state and appreciable resistance in a second state.

Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
5491411 Method and apparatus for imaging microscopic spatial variations in small currents and magnetic fields Feb. 13, 1996
5488295 Method and apparatus for cancelling noise of a low-noise sensor Jan. 30, 1996
5487304 Superconducting dual junction gyroscope apparatus Jan. 30, 1996
5475306 Squid magnetivity having a totally enclosing electromagnetic shield with a predeterminded sheet resistance for low noise Dec. 12, 1995
5473249 Superconductive device including a supercooled first body heated by electromagnetic radiation at a first frequency and a supercooled second body heated at a second frequency greater than the t Dec. 5, 1995
5471985 Biomagnetometer with whole head coverage of a seated or reclined subject Dec. 5, 1995
5469056 Planar gradiometers arranged on non-parallel surfaces for determination of a gradient tensor of a magnetic field Nov. 21, 1995
5469057 Method and apparatus for extending the dynamic range of DC-squid measurements using a flux tracking loop Nov. 21, 1995
5467015 Superconducting magnetometer having increased bias current tolerance and producing digital output Nov. 14, 1995
5465049 Integrated type planar magnetic sensor having SQUID and flux transformer formed of oxide superconductor Nov. 7, 1995
5463518 Magnetic head and magnetic recording and reproducing apparatus using a superconducting quantum interference device Oct. 31, 1995
5453691 Miniaturized squid module having an intermediate super conducting support for connecting squid input terminals to gradiometer wires Sep. 26, 1995
5453690 Squid magnetometer in which feedback current for a squid flux-locked-loop is conductively coupled into the input circuit of the squid Sep. 26, 1995
5451871 Pick-up coil assemblies and system for use in a multi-channel squid magnetometer Sep. 19, 1995
5444372 Magnetometer and method of measuring a magnetic field Aug. 22, 1995
5444373 Biomagnetometer with selectable pickup coil array Aug. 22, 1995
5442289 Biomagnetometer having flexible sensor Aug. 15, 1995
5437276 Apparatus for measuring magnetic sources Aug. 1, 1995
5436471 Josephson junction apparatus formed on flexible polymeric film Jul. 25, 1995
5424641 SQUID fluxmeter having a pulse mulliplication circuit number for accurately measuring large rates of change in flux Jun. 13, 1995
5420100 Planar squid magnetometer with inductively coupled microstrip resonator May. 30, 1995
5414356 Fluxmeter including squid and pickup coil with flux guiding core and method for sensing degree of deterioration of an object May. 9, 1995
5406847 Superconducting gyroscope Apr. 18, 1995
5406201 Magnetic field detecting circuit having a relaxation oscillator SQUID Apr. 11, 1995
5392210 Method for locating the position of electrophysiological activities Feb. 21, 1995
5387864 Channel equalized DC squid flux-locked loop Feb. 7, 1995
5384109 Diagnostic magnetometry using superparamagnetic particles Jan. 24, 1995
5379018 High temperature superconductor magnetic-switch Jan. 3, 1995
5372132 Sensor positioning aid and method Dec. 13, 1994
5367259 Active shielding device based on SQUID and feedback therefrom for the reduction of environmental magnetic noise Nov. 22, 1994
5355085 Multichannel SQUID flux meter having multiplexed SQUID flux sensors Oct. 11, 1994
5352978 Apparatus for sensing a magnetic field with a superconductive material Oct. 4, 1994
5349291 Superconducting magnetic sensor having a cryostat for improved sensitivity of magnetic detection Sep. 20, 1994
5343707 Methods and apparatus for removing cyclic noise from the output signal of a magnetic sensor Sep. 6, 1994
5343147 Method and apparatus for using stochastic excitation and a superconducting quantum interference device (SAUID) to perform wideband frequency response measurements Aug. 30, 1994
5339811 Magnetoencephalograph Aug. 23, 1994
5334884 Three junction squid mixer Aug. 2, 1994
5331278 Apparatus for inspecting degradation/damage of a material using an AC magnet, a superconducting DC magnet and a SQUID sensor Jul. 19, 1994
5329229 Magnetic field detection coils with superconducting wiring pattern on flexible film Jul. 12, 1994
5326986 Parallel N-junction superconducting interferometer with enhanced flux-to-voltage transfer function Jul. 5, 1994
5327130 Spur-free sigma-delta modulator and multiple flux quanta feedback generator Jul. 5, 1994
5323777 Sensor position indicator coils to be used in magnetoencephalographic experiemnts and a means of attaching them to the head Jun. 28, 1994
5319307 Geometrically and electrically balanaced dc SQUID system having a pair of intersecting slits Jun. 7, 1994
5311125 Magnetic property characterization system employing a single sensing coil arrangement to measure AC susceptibility and DC moment of a sample May. 10, 1994
5311129 Local magnetic field measurement apparatus having gradiometers arranged on non-parallel, non-orthogonal surfaces May. 10, 1994
5309095 Compact magnetometer probe and an array of them covering the whole human skull for measurement of magnetic fields arising from the activity of the brain May. 3, 1994
5306521 Process for manufacturing DC superconducting quantum interference device Apr. 26, 1994
5294884 High sensitive and high response magnetometer by the use of low inductance superconducting loop including a negative inductance generating means Mar. 15, 1994
5293119 Electromagnetic microscope for evaluation of electrically conductive and magnetic materials Mar. 8, 1994
5291135 Weak magnetic field measuring system using dc-SQUID magnetometer with bias current adjustment and/or detecting function of abnormal operation Mar. 1, 1994

1 2 3 4 5 6 7 8

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