Celebrity Inventors
Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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 |
| 5644232 | Quantitation and standardization of magnetic resonance measurements An MRI apparatus and method useful for both industrial applications and medical applications is provided. The apparatus and procedures are capable of estimating the value of a continuous property, such as concentration, viscosity or the like by interpolat... | 07/01/1997 |
| 5602475 | Laser pumped magnetometer A single-mode semiconductor laser for optical pumping in He and 4 He and high-sensitivity magnetometers based upon these systems. A distributed Bragg reflection (DBR) or distributed feedback (DFB) single mode, preferably InGaAs laser... | 02/11/1997 |
| 5534776 | Coupled radio frequency field and light polarization magnetometer A coupled radio frequency field and light polarization magnetometer. The polarization direction P and the direction of the radio frequency field B1 are kept parallel to one another and perpendicular to the field B0 which is to be mea... | 07/09/1996 |
| 5493223 | Resonance magnetometer with optical pumping using a monolithic laser Resonance magnetometer with optical pumping using a monolithic laser. The laser (30) includes a single element (32) (crystal or fiber) whose length is modulated to provide both a wavelength and amplitude control.... | 02/20/1996 |
| 5436561 | Resonance magnetometer with optical pumping using a monolithic laser Resonance magnetometer with optical pumping using a monolithic laser. The laser (30) includes a single element (32) (crystal or fiber) ensuring whose length is modulated to provide both a wavelength and amplitude control.... | 07/25/1995 |
| 5420549 | Extended linear ion trap frequency standard apparatus A linear ion trap for frequency standard applications is provided with a plurality of trapping rods equally spaced and applied quadrupole rf voltages for radial confinement of atomic ions and biased level pins at each end for axial confinement of the ions... | 05/30/1995 |
| 5272436 | Optical pumping, resonance magnetometer using a light beam with controlled polarization Optical pumping magnetometer with controlled polarization. This magnetometer comprises a linear polarizer (16), whose orientation is controlled (42,44) in such a way that the detection signal is at a maximum, no matter what the orientation of the field to be m... | 12/21/1993 |
| 5254947 | Optical pumping, resonance magnetometer using a plurality of multiplexed beams A magnetometer for precise measurement of weak magnetic fields involves a system which injects a plurality of light beams into a gas containing cell. An optical multiplexer receives the light beams emitted by a source and successively supplies a plurality... | 10/19/1993 |
| 5245280 | Magnetic resonance magnetometer with multiplexed exciting windings A magnetometer having three trirectangular trihedron windings (20x, 20y, 20z) which are put into service successively by a multiplexer (50). The means frequency (Fm) of the three measurement signals is independent of the orientation of the weak... | 09/14/1993 |
| 5233298 | Quantitative measurement of blood flow at multiple positions using comb excitation and fourier velocity encoding A method of imaging and quantitatively measuring blood velocity distribution within a selected vessel employs Nuclear Magnetic Resonance excitation of a number of regions of a subject to be imaged by an rf excitation pulse applied in a magnetic field grad... | 08/03/1993 |
| 5227722 | Dead-zone free optically pumped MZ magnetometer A gas cell, preferably in the shape of a hemi-sphere, forms a transparent enclosure for helium or an alkali metal vapour. A coil forms an A.C. magnetic field H1 in the enclosure, the magnetic field having multi-directional field lines. A lamp o... | 07/13/1993 |
| 5225778 | Optical pumping, resonance magnetometer using a sequential polarization An improved optical pumping magnetometer with sequential polarization for measurement of weak magnetic fields involves a device which sequentially modifies the polarization either in the direction of the polarization or from clockwise to counterclockwise ... | 07/06/1993 |
| 5191288 | Coil for generating gradient magnetic field A gradient magnetic field coil for generating a gradient magnetic field comprises at least one pair of conductive thin plates placed on a surface of a cylinder and rod conductors for supplying an electric current to at least one pair of conductive thin pl... | 03/02/1993 |
| 5189368 | Magnetometer A magnetometer is desclosed in which a gas cell containing atomic vapor is pulse pumped at one of the transitions of the gas in the cell. After the pulse has passed through the gas cell, thereby causing alignment of all the individual atomic moments along... | 02/23/1993 |
| 5162732 | He3 solenoid magnetometer A magnetometer having an enclosed cell containing He3 therein for receiving light from a light source, a light source for directing light to the enclosed cell along a predetermined path, a single pick-up coil containing therein the light source... | 11/10/1992 |
| 5053708 | System for the optical pumping of a cell of atomic or molecular gases and its application to a magnetometer A system for the optical pumping of a cell of atomic or molecular gases comprises at least one optical cavity comprising at least one cell of atomic or molecular gases, one optical pumping wave being coupled to the optical cavity.... | 10/01/1991 |
| 5036278 | Radiation source for helium magnetometers A radiation source (12) for optical magnetometers (10) which use helium isotopes as the resonance element (30) includes an electronically pumped semiconductor laser (12) which produces a single narrow line of radiation which is frequency stabilized to the... | 07/30/1991 |
| 5006802 | Magnetic detection method and device for the implementation thereof In a magnetic field measuring device, conveyed by a carrier vehicle and released from this vehicle in order to be put into action, the excitation means and the measuring means of a nuclear magnetic resonance helium magnetometer are separated. These measur... | 04/09/1991 |
| 4814707 | Scalar magnetometer with vector capabilities A scalar magnetometer with vector capabilities includes a cell containing 3 He gas at a pressure between 0.05 Torr and 100 Toor. The cell is energized by an oscillator which partially ionizes the 3 He gas. Metastable atoms are polari... | 03/21/1989 |
| 4806864 | Laser-pumped helium magnetometer A magnetometer comprises a transparent spherical photocell (1) filled with natural helium 4He. A laser (2) of the LNA (lanthanum-neodymium aluminate) type excites the photocell. An oscillator (3) generates a soft discharge inside the photocell (1). The el... | 02/21/1989 |
| 4780672 | Laser driven helium magnetometers A helium magnetometer includes a helium cell containing helium, preferable 4 He. A solid state laser strikes the helium cell at one end with a laser having a wave length of 1082.91 nm in the embodiment of a 4 He cell. The helium atom... | 10/25/1988 |
| 4617462 | Polarized internal target apparatus A polarized internal target apparatus with a polarized gas target of improved polarization and density achieved by mixing target gas atoms with a small amount of alkali metal gas atoms, and passing a high intensity polarized light source into the mixture ... | 10/14/1986 |
| 4600886 | Apparatus for orienting a magnetometer A system for measuring the earth's magnetic field includes a magnetometer and apparatus for maintaining a predetermined magnetometer tilt in the magnetic meridional plane regardless of changes in vehicle heading. The magnetometer is of the type whose opti... | 07/15/1986 |
| 4567439 | Apparatus for measuring the magnitude of a magnetic field An apparatus for measuring the magnitude of a magnetic field in one embodiment includes a 3 He cell having an oscillator connected thereto for producing an electrical discharge for metastable 3 He atoms, a 4 He lamp having... | 01/28/1986 |
| 4544891 | Nuclear magnetic resonance gyroscope A nuclear magnetic resonance gyroscope which derives angular rotation thef from the phases of precessing nuclear moments utilizes a single-resonance cell situated in the center of a uniform DC magnetic field. The field is generated by current flow throug... | 10/01/1985 |
| 4525672 | Apparatus and method for laser pumping of nuclear magnetic resonance cell A method and apparatus for optical pumping of an NMR cell by means of laser light. A current driver provides an a.c. current waveform as injection current to a laser diode. The resulting laser intensity spectrum closely approximates the absorption spectru... | 06/25/1985 |
| 4509014 | Nuclear magnetic resonance gyroscope A nuclear magnetic resonance gyroscope which derives angular rotation thef from the phases of precessing nuclear moments utilizes a single-resonance cell situated in the center of a uniform DC magnetic field. The field is generated by current flow throug... | 04/02/1985 |
| 4494085 | Miniaturized atomic frequency standard having both filter cell and absorption cell in resonator cavity An optical-physics package used in an atomic frequency standard is miniaturized and the performance thereof improved. The optical-physics package includes a microwave cavity in which is positioned a filter cell and an absorption cell, preferably located i... | 01/15/1985 |
| 4450407 | Magnetic resonance cell and method for its fabrication There is disclosed a magnetic alignment device and method for its fabrication in which the aligned magnetic moments of a gas enclosed within a container have an increased relaxation time, hence an increase signal to noise output. One embodiment is a nucle... | 05/22/1984 |
| 4446428 | Magnetic resonance cell There is disclosed a nuclear magnetic alignment device for use in a nuclear magnetic resonance gyroscope and the like. One embodiment includes a container for gas having a layer of rubidium hydride on its inner surface. The container comprising a spherica... | 05/01/1984 |
| 4430616 | Nuclear magnetic resonance gyro scope A nuclear magnetic resonance gyro using two nuclear magnetic resonance gases, preferably xenon 129 and xenon 131, together with two alkaline metal vapors, preferably rubidium, potassium or cesium, one of the two alkaline metal vapors being pumped by light... | 02/07/1984 |
| 4414535 | Magnetic resonance gyro signal processor A signal processor which involves separation of the cell signals from a magnetic resonance gyro (MRG) using phase locked loops that also serve as frequency multipliers, phase shifting one cell output to maintain phase comparisons within the monotonic regi... | 11/08/1983 |
| 4406986 | Auxiliary DC field coil for improving rate bias instability of magnetic resonance gyroscopes A magnetic resonance gyroscope has auxiliary coils mounted adjacent the coils which normally produce the DC Ho field for the gyro spin generators. The auxiliary coils establish an inhomogeneous Ho field which results in a reduction o... | 09/27/1983 |
| 4403190 | Magnetic resonance gyroscope with spectral control A magnetic resonance gyroscope wherein the pump lamp includes an isotopic mixture of Hg, which controls the optical spectra of the pump beam to eliminate 201 Hg alignment moments and to reduce light-induced frequency shifts. The inclusion of qu... | 09/06/1983 |
| 4327327 | All-angle gradient magnetometer In order to provide an all-angle gradient magnetometer, first and second magnetic resonance cells are mounted to a common base and separated by a predetermined distance. Circularly polarized pumping light is passed through the two cells orthogonally. Mixe... | 04/27/1982 |
| 4316147 | Apparatus for determining the composition of mercury-cadmium-telluride and other alloy semiconductors Apparatus for determining the composition of mercury-cadmium-telluride or other alloy semiconductors by using a four-photon mixing phenomenon. Means are provided for a pair of colinear laser beams of different optical frequencies such that the colinear be... | 02/16/1982 |
| 4291272 | Method for reducing homonuclear broadening in magnetic resonance spectra of solids A method for line narrowing in nuclear magnetic resonance (NMR) studies in solids is described. The method employs quasi-continuous amplitude modulation of an rf field wherein the field is eliminated at intervals for short periods of time at or about the ... | 09/22/1981 |
| 4209746 | Magnetic field gradient measuring device Disclosure is made of a magnetic field gradient measuring device comprising two sensors arranged at points of a magnetic field which are to be investigated, and connected with their outputs to inputs of a phase detector. Each of the two sensors comprises ... | 06/24/1980 |
| 4147974 | Nuclear gyroscope with unequal fields An optically pumped magnetic resonance gyroscope wherein the direction of the magnetic fields intersecting the absorption cells of two interconnected spin generators may be oriented in the same or opposite directions, but are of unequal magnitude. The out... | 04/03/1979 |
| 4005355 | Method and apparatus for stimulating narrow line resonance conditions A narrow line magnetic resonance device is disclosed which includes a radiation source to produce a beam of radiation for stimulating resonance lines in a quantum mechanical spin system. Frequent spin exchange collisions are utilized to produce narrow spe... | 01/25/1977 |
