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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7358159 | Method for manufacturing ZnTe compound semiconductor single crystal ZnTe compound semiconductor single crystal, and semiconductor device The present invention relates to a method for producing an n-type ZnTe system compound semiconductor single crystal having high carrier concentration and low resistivity, the ZnTe system compound semiconductor single crystal, and a semiconductor device produced by u... | 04/15/2008 |
| 6895340 | Method of molecular structure recognition An analytical method and apparatus using principal component analysis of nuclear magnetic resonance (NMR) data for rapid molecular structure/function pattern recognition. The presence of a molecular substructure in an organic compound is determined by comparing prin... | 05/17/2005 |
| 5466480 | Method for making an NMR coil Three-dimensional RF coils suitable for use in NMR spectroscopy or imaging are described, as well as methods for making such coils. The coil is made from a thin-walled, non-magnetic, electrically insulating tube. The tube is then masked and a first conduc... | 11/14/1995 |
| 5396206 | Superconducting lead assembly for a cryocooler-cooled superconducting magnet A superconducting magnet lead assembly for a cryocooler-cooled superconducting magnet having a design current of between generally 50 and 250 amperes. A DBCO (Dysprosium Barium Copper Oxide), YBCO (Yttrium Barium Copper Oxide), or BSCCO (Bismuth Strontium... | 03/07/1995 |
| 5351007 | Superconducting magnetic resonance probe coil A broadband matching network for coupling a magnetic resonance probe to a preamplifier utilizes superconducting matching coils and superconducting locatable shields to detect very weak magnetic signals over a broad bandwidth. The superconducting matching ... | 09/27/1994 |
| 5276398 | Superconducting magnetic resonance probe coil A magnetic resonance probe coil is fabricated using a superconductive material for the coil. Three distinct embodiments are described: a single-layer coil with no crossovers; a dual-film coil wherein the capacitors are formed through an intermediate diele... | 01/04/1994 |
| 5021739 | Superconductor type radio frequency with adjustable inductance magnetic flux measuring circuit An RF magnetic flux measuring circuit uses a SQUID fluxmeter of which the input and output characteristics establish a periodic function, and in which a pick-up coil for picking up desired RF magnetic flux and an input coil of the SQUID fluxmeter are conn... | 06/04/1991 |
| 4931735 | Superconductive magnet system comprising superconductive cylinders In a magnetic resonance apparatus a system of concentric cylinders of superconductive material maintain an effective steady magnetic field in a measured space within the inner cylinder which field is very homogeneous and is, moreover, very constant in tim... | 06/05/1990 |
| 4926289 | Actively shielded, superconducting magnet of an NMR tomography apparatus An actively shielded, superconducting magnet of a nuclear magnetic resonance tomography apparatus has an inner coil system and an outer coil system connected in series to avoid an increase in the external field upon the quench of one of the coil systems. ... | 05/15/1990 |
| 4652824 | System for generating images and spacially resolved spectra of an examination subject with nuclear magnetic resonance For providing nuclear magnetic resonance equipment with reduced noise generation, gradient coils are disposed in the vacuum of the cryostat which accepts the superconducting magnetic coils for generating the fundamental field. Under given conditions, the ... | 03/24/1987 |
| 4651099 | Scan room for magnetic resonance imager A scan room is disclosed in which a magnetic resonance (MR) imager can be located that will reduce to an acceptable level outside the room the strength of the fringe magnetic fields produced by the imager and that will shield the imager from magnetic, rad... | 03/17/1987 |
| 4649348 | Radio frequency coils for nuclear magnetic resonance imaging systems A family of high Q radio frequency coils for an NMR imaging system is provided. The coil family includes a transmitting coil for transmitting an r.f. field aligned with a given plane. The transmitting coil is used with one of the described receiving coils... | 03/10/1987 |
| 4647858 | Methods for overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging Methods for overcoming transient magnetic field gradient inhomogeneity in a nuclear magnetic resonance imaging and/or nuclear magnetic resonance spectroscopic imaging system, wherein the inhomogeneities are induced by the pulsed magnetic field gradients u... | 03/03/1987 |
| 4646024 | Transverse gradient field coils for nuclear magnetic resonance imaging In the production of nuclear magnetic resonance images, it is necessary to provide various magnetic fields with specified orientations and configurations in particular relationships with respect to a cylindrical coil form on which the RF and gradient coil... | 02/24/1987 |
| 4642569 | Shield for decoupling RF and gradient coils in an NMR apparatus A shield for decoupling radio frequency (RF) and magnetic field gradient coils in an NMR apparatus is made up of first and second arrays of electrically conductive regions separated from one another by relatively narrow non-conductive regions. The arrays ... | 02/10/1987 |
| 4641097 | Elliptical cross-section slotted-tube radio-frequency resonator for nuclear magnetic resonance imaging A radio-frequency coil, for nuclear magnetic resonance imaging at Larmor frequencies associated with a magnetic field of greater than about 0.5 Tesla, comprises a slotted-tube radio-frequency resonator having an elliptical cross-section. First and second ... | 02/03/1987 |
| 4639672 | Nuclear magnetic resonance apparatus Inside the gradient coils in the magnet system of a nuclear magnetic resonance apparatus there is arranged a sleeve which forms a noise-absorbing shield between the gradient coils and the measurement space. The shield is preferably formed by an evacuated ... | 01/27/1987 |
| 4638252 | Circuit for detecting RF coil assembly position in an MR scanner A circuit for detecting the position of a radio frequency (RF) coil assembly in a magnetic resonance (MR) scanner includes, in the preferred embodiment, a normally closed switch connected to ground in parallel with a PIN diode which forms part of a transm... | 01/20/1987 |
| 4638253 | Mutual inductance NMR RF coil matching device A matching device uses mutual inductance to couple an NMR radio frequency (RF) coil to an RF power amplifier and RF receiver preamplifier. The device includes a matching coil connected to the RF power amplifier and preamplifier and which is positioned bet... | 01/20/1987 |
| 4636729 | Gradient coil system for a nuclear spin tomography installation The gradient coil system for a nuclear spin tomography installation encloses a hollow cylindrical support body, the cylinder axis of which extends in the z direction of an orthogonal x-y-z coordinate system with the coordinate origin in the imaging center... | 01/13/1987 |
| 4636730 | NMR spectroscopy body probes with at least one surface coil An NMR spectroscopy body probe is comprised of at least one surface coil, each coil having at least one turn and positioned adjacent to a first surface of an insulative member; an electric-field-reducing shield is fabricated upon the other surface of the ... | 01/13/1987 |
| 4629989 | Patient alignment system for NMR studies A patient alignment system utilizes stationary and mobile light fan beams for precisely positioning a patient for performing NMR studies. One assembly of preferably laser light sources is utilized to create a visible reference point for aligning a patient... | 12/16/1986 |
| 4623844 | NMR inhomogeneity compensation system The volume of interest is excited. An array of pickup coils with water cores provide an array of signals whose frequencies indicate the magnetic field distribution. These frequencies are estimated and used to produce controlled magnetic field inhomogeneit... | 11/18/1986 |
| 4617516 | Axial magnetic field gradient coil suitable for use with NMR apparatus A cylindrical coil for providing a magnetic field having a substantially linear gradient in an axial direction within the volume of the cylinder, as can be utilized in NMR apparatus, includes a cylindrical coil support structure and electrically conductiv... | 10/14/1986 |
| 4616181 | Nuclear magnetic resonance tomography apparatus The transmitter/measurement coil of a nuclear magnetic resonance tomography apparatus for medical diagnosis in which comparatively high Larmor frequencies are used, is divided into a number of parallel-connected subcoils. The self resonance frequency of t... | 10/07/1986 |
| 4613820 | RF shielded room for NMR imaging system A radio-frequency shielded room for a nuclear magnetic resonance imaging system has at least one electrically-conductive shield wall substantially enclosing a predetermined volume adjacent to one end of the bore formed through an imaging magnet within whi... | 09/23/1986 |
| 4612505 | Nuclear magnetic resonance apparatus A nuclear magnetic resonance apparatus comprises an electromagnetic system in which a shield of a magnetic material is arranged about the coil system for the homogeneous magnetic field. By providing the magnetic material, for example soft iron, directly a... | 09/16/1986 |
| 4590428 | Electromagnet for NMR tomography An electromagnet for generating the constant magnetic field required in NMR tomography includes a superconductive coil system consisting of at least one circular cylindrical field coil (1) and at least one correction coil (2, 3) concentric with the field ... | 05/20/1986 |
| 4590427 | Nuclear magnetic resonance apparatus having semitoroidal rf coil for use in topical NMR and NMR imaging An improved nuclear magnetic resonance (NMR) apparatus for use in topical magnetic resonance (TMR) spectroscopy and other remote sensing NMR applications includes a semitoroidal radio-frequency (rf) coil. The semitoroidal rf coil produces an effective alt... | 05/20/1986 |
| 4587492 | Thermal barrier for variable temperature NMR An NMR system for obtaining high resolution spectroscopic measurements at a selected temperature includes gradient correcting means disposed in proximity to an NMR probe, for imposing desired gradients on the volume occupied by the sample within the probe... | 05/06/1986 |
| 4581583 | Apparatus for sample selecting, placing and retrieving for use with NMR spectrometers A sample selecting, positioning and retrieving mechanism embodies a carousel having preferably inner and outer concentric rows of cylindrical tubes placed vertically between parallel upper and lower carousel plates. Each vertical tube is equipped with a r... | 04/08/1986 |
| 4528508 | Nuclear magnetic resonance method and apparatus for remote detection and volumetric measurement of petroleum reserves A new method and apparatus is described which allows remote sensing and in-situ volumetric measurement of liquid petroleum reserves. A small fraction of the nuclear magnetic moments of protons in a liquid oil reserve align in the earth's magnetic field. T... | 07/09/1985 |
| 4511841 | Method and apparatus for high speed magic angle spinning A nuclear magnetic resonance spinning apparatus includes an elongated cylindrical sample rotor with slotted air vanes on one tapered end thereof, an axial stator air drive and air end bearing, and a lateral ring air bearing around the opposite end of the ... | 04/16/1985 |
| 4506224 | High-frequency field system for nuclear magnetic resonance apparatus An apparatus for generating a substantially homogeneous magnetic high-frequency field and/or for receiving high-frequency signals in a nuclear magnetic resonance apparatus, such as zeugmatography. The apparatus contains at least two conductor sections of ... | 03/19/1985 |
| 4498048 | NMR Imaging apparatus An NMR imaging apparatus is described having a desired imaging volume for imaging of biological tissue, said apparatus comprising bias means for generating a bias field, means for generating gradient fields, and radio frequency means for applying a pulse ... | 02/05/1985 |
| 4477777 | Analysis of biological material A method of determining or imaging fats in a non 13 C enriched biological sample, particularly human tissue comprising subjecting the sample to a magnetic field, irradiating the sample with radiofrequency electromagnetic radiation, obtaining fr... | 10/16/1984 |
| 4471305 | Method and apparatus for rapid NMR imaging of nuclear parameters with an object An imaging NMR scanner obtains plural spin echo signals during each of successive measurement cycles permitting determination of the T2 parameter for each display pixel after but a single measurement sequence. The amplitude of the NMR spin echo responses ... | 09/11/1984 |
| 4463328 | Capacitively shortened coaxial resonators for nuclear magnetic resonance signal reception A capacitively shortened coaxial resonator for making nuclear magnetic resonance measurements includes inner and outer concentrically arranged metal cylinders. The cylinders define therebetween a sample region and are shorted electrically by a conductive ... | 07/31/1984 |
| 4446430 | Sample spinner for nuclear magnetic resonance spectrometer A sample spinner for a nuclear magnetic resonance spectrometer having improved operating characteristics is described comprising a rotor supported at both ends by support gas bearings and positioned by a thrust gas bearing. Improved support gas bearings a... | 05/01/1984 |
| 4442404 | Method and means for the noninvasive, local, in-vivo examination of endogeneous tissue, organs, bones, nerves and circulating blood on account of spin-echo techniques This invention relates to methods and means for improving the sensitivity and signal-to-noise ratio of spin-echo measurements on samples, which have to remain at their own temperature and which have a non-negligible electrical conductivity. These are appl... | 04/10/1984 |
