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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 6104672 | General fluctuation sensitive filter An apparatus and method for filtering the effects of large amplitude signal fluctuations from elements of the cross-spectral density matrix of a detor array. The outputs of the array are sampled T times, and the values of each element of the matrix form... | 08/15/2000 |
| 6036351 | Advanced signal processing filter A filter, and method of the filtering, for increasing the signal to noise tio of relatively small and constant amplitude signals in the presence of relatively large and varying amplitude signals. The filter produces a filtered power level az pr... | 03/14/2000 |
| 5956171 | Electro-optic modulator and method An optical intensity modulator which uses a Sagnac interferometer having an electro-optic phase modulator therein. An electric modulation signal is delivered to the modulator, and the latter is selected so that the phase velocity of optical and electrical... | 09/21/1999 |
| 5930313 | Method and apparatus for transporting an intense ion beam A method and apparatus for transporting a positive ion beam to a distant target. An ion channel is created as a path to the target, and the beam injected into the channel at a mildly-relativistic beam velocity. Because the beam is mildly-relativistic, the... | 07/27/1999 |
| 5923776 | Object extraction in images A method and apparatus for extracting an object from an image, in which one locates a pixel within the image (the "central" pixel), and then sequentially compares the brightness of neighboring pixels, proceeding outward from the central pixel. In so doing... | 07/13/1999 |
| 5892901 | Secure identification system A system in which two circuits which are spatially mobile with respect to one another communicate with one another over a preselected range to identify themselves. So long as the communication remains, one of the circuits, called a detector, maintains the... | 04/06/1999 |
| 5838021 | Single electron digital circuits Disclosed are single electron digital devices, in which the screening lengths of individual device islands are between 0.5 and 1.0 islands. This range permits island occupancy to be bias independent, permitting the devices to hold or process digital infor... | 11/17/1998 |
| 5822111 | Apparatus and method for coherent acousto-optic signal width modification A apparatus and method for coherently stretching or compressing signals of nterest, i.e. without loss of information. A first, or tapping, Bragg cell has an acoustic signal launched in it which is modulated onto a laser carrier. The signal of interest is l... | 10/13/1998 |
| 5804967 | Apparatus and method for generating short pulses for NMR and NQR processing An apparatus using nuclear magnetic or quadrupole resonance to detect selected nuclei in a specimen (e.g., specimens containing a class of explosives or narcotics). The apparatus includes a pulsing unit to generate an RF pulse or a train of pseudo-random ... | 09/08/1998 |
| 5789931 | Quantitative mobility spectrum analysis for magnetic field dependent hall and resistivity data A method and apparatus for producing the conductivity-mobility spectrum of an isotropic semiconductor material, and hence infer the mobility and concentration of carriers in the material. Hall voltage and material conductivity are measured at a plurality ... | 08/04/1998 |
| 5781063 | Continuous-time adaptive learning circuit An integrator-multiplier-integrator circuit scheme usable in transverse fers, a transverse filter employing such a circuit, and a method for using each. The multiplier-integrator-multiplier has a capacitatively loaded integrating amplifier fed by a trans... | 07/14/1998 |
| 5766343 | Lower bandgap, lower resistivity, silicon carbide heteroepitaxial material, and method of making same A silicon carbide semiconductor material; and method of making same, in which a doped film of 3C-silicon carbide is grown heteroepitaxially on a 6H-silicon carbide material. Growth occurs at 1200° C. or less, and produces a heterolayer having a reduced b... | 06/16/1998 |
| 5748312 | Sensing apparatus and method for detecting strain between fiber bragg grating sensors inscribed into an optical fiber A sensing apparatus and related method for sensing strain between fiber Bragg grating sensors inscribed in an optical fiber. The fiber is inscribed with a first fiber Bragg grating sensor and a second fiber Bragg grating sensor. A strain detection unit de... | 05/05/1998 |
| 5732045 | Fluctuations based digital signal processor including phase variations A scheme for filtering noise from a signal, in which the noise fluctuates significantly in phase. The signal is sampled to produce N members of a time series and the phase of each signal extracted in the form of a magnitude and a phaser, i.e. for a time s... | 03/24/1998 |
| 5724135 | Hyper-spectral imaging using rotational spectro-tomography A rotational hyper-spectral imager is disclosed. The rotational hyper-spectral imager collects substantially all available photon flux emitted by an object being detected and analyzed and allows the rotational hyper-spectral imager to determine the compos... | 03/03/1998 |
| 5706192 | Antiphase switching in arrays of globally coupled oscillators A method and apparatus for accessing anti-phase states in a nonlinear system by globally coupling an array of oscillators. For N number of oscillators in the system, there are (N-1)| anti-phase (AP) states in phase space. AP states exist where each wavefo... | 01/06/1998 |
| 5617092 | High resolution encoding circuit and process for analog to digital conversion An analog-to-digital converter in which an analog input signal is folded by a plurality of folding circuits whose moduli, and hence half folding periods, are mutually prime with respect to one another. Each folding circuit has an associated comparator lad... | 04/01/1997 |
| 5572320 | Fluid sampler utilizing optical near-field imaging An optical scheme for in situ identification of particulates in fluid such s engine oil, in which a portion of the fluid flow is tapped, fed via a conduit to a pair of optically transparent opposed plates, imaged through the plates, and the fluid returned ... | 11/05/1996 |
| 5559754 | Sediment classification system A computer driven system which receives time-binned echo strength data, and hich, for each series of echo strengths received, stores the echo strength data in computer memory, and automatically associates with that data the latitude, longitude and time at ... | 09/24/1996 |
| 5512743 | Space-based asteroid detection and monitoring system A satellite-borne system for the detection of near earth objects. The system periodically captures two images of the celestial sphere about the earth using a pair of linear arrays of optical detectors oriented so that the detectors image lines on the cele... | 04/30/1996 |
| 5502448 | Method and means for short pulse interference rejection A radar interference circuit which rejects both continuous noise and shorulse interference signals. A plurality of omni-directional antennas are placed around the main directional radar antenna and connected in differing sets to a plurality of canceller ... | 03/26/1996 |
| 5499255 | Coaxial hybrid wiggler An electromagnetic wiggler having a cylindrical member, and a central member disposed axially within the cylindrical member, both of which are formed from alternating cylindrical sections of ferromagnetic and non-ferromagnetic material, each sequential pa... | 03/12/1996 |
| 5495366 | Apparatus and method for eliminating polarization sensitivity in transducers An apparatus and method for converting a signal of arbitrary polarization one of preselected polarization, e.g. for use by a sensor, transducer, etc. A signal splitter divides the input signal into its orthogonal linearly polarized components, and launch... | 02/27/1996 |
| 5491487 | Slaved Gram Schmidt adaptive noise cancellation method and apparatus A method and apparatus are provided for filtering noise from a plurality of input signals in a sensor system. One first main input signal and several first auxiliary input signals are obtained and interior weights corresponding to the first main and auxil... | 02/13/1996 |
| 5488475 | Active fiber cavity strain sensor with temperature independence A strain sensor system formed from a laser cavity where changes in length of the cavity are used to measure strain. The cavity can include a passive optical fiber strain sensing section and/or an active doped optical fiber section that lases when pumped b... | 01/30/1996 |
| 5452265 | Active acoustic impedance modification arrangement for controlling sound interaction An active impedance modification device or arrangement enables the interaction of sound with a structural surface to be controlled, e.g., so that, reflections from that surface (which can be the hull of a submarine) are substantially reduced or eliminated... | 09/19/1995 |
| 5448680 | Voice communication processing system A voice communication processing system and method for processing a speech waveform as a digital bit stream having a reduced number of bits representing speech parameters. The bit representation of amplitude parameters is reduced by storing only probable ... | 09/05/1995 |
| 5422584 | Variable phase sine wave generator for active phased arrays A waveform generator is provided for generating a high frequency waveform. A pulse generator provides a pulse train at a low frequency. A pulse converter converts the pulse train into an alternatingly positive and negative groups of pulses. A bandpass fil... | 06/06/1995 |
| 5410404 | Fiber grating-based detection system for wavelength encoded fiber sensors An apparatus for the determination of the wavelength and the detection of velength shifts in wavelength-encoded fiber sensors, such as Bragg grating sensors. The apparatus is implemented in fiber and uses a pair of tuned fiber gratings to provide a filter... | 04/25/1995 |
| 5364816 | Fabrication method for III-V heterostructure field-effect transistors A heterojunction device, and a method for producing the device. A gate air bridge is formed at the mesa sidewall between the active region and the gate bonding pad to lower the gate leakage current. The device has a double recessed gate to reduce local fi... | 11/15/1994 |
| 5365239 | Fiber optic feed and phased array antenna A fiber optic feed includes an optical circuit for providing at least one optical output signal modulated according to an RF source and an antenna interface for demodulating the at least one optical output signal and communicating with an antenna, wherein... | 11/15/1994 |
| 5359411 | Method and apparatus for evaluating the optical spatial response characteristics of objects An apparatus and method for optically testing an object, such as an optical etector whose pixels are an array of optically sensitive charged coupled devices. Two mutually coherent beams of light are interfered on the object to form an interference fringe p... | 10/25/1994 |
| 5355325 | Method and apparatus for correlating object measurements with object measurement estimates A method for efficiently determining correlations between tracks and objects in a multi-target tracking system comprises defining a current track measurement estimate for each track, and building a measurement tree from the track measurement estimates. Th... | 10/11/1994 |
| 5323126 | Self-initializing circuit link A circuit link, and method for using link, for self initializing any device peratively connected to the link. An input signal is split into two portions, one of which is delayed so that the undelayed signal can transverse the circuit link before the delaye... | 06/21/1994 |
| 5321333 | Torsional shear wave transducer A low frequency torsional transducer for the generation and/or reception of shear waves in a substantially solid medium. The transducer includes a spool like radiating structure to which are fixedly attached spaced piezoelectric elements. The elements und... | 06/14/1994 |
| 5311098 | Interference photocathode An interference photocathode includes a reflective substrate and interference layers disposed on said reflective substrate for selectively enhancing a first photoelectric yield of said photocathode when irradiated by radiation having a first wavelength re... | 05/10/1994 |
| 5309007 | Junction field effect transistor with lateral gate voltage swing (GVS-JFET) A field effect transistor having a buried gate, and one or more gates disposed along the channel between the source and drain, which cooperate to cause the electric field within the channel along its length to be more uniform, and have a lower field maxim... | 05/03/1994 |
| 5281894 | Dual cavity for a dual frequency gyrotron A gyrotron providing first and second microwave frequencies comprises a dual frequency cavity coupled between an electron gun and a waveguide. The electron gun, the dual frequency cavity and a segment of the waveguide are surrounded by a variable magnetic... | 01/25/1994 |
| 5250954 | Color-coded radar plan position indicator A method to enhance target detectability on a radar plan position indicator s described which includes the receiving of coherent pulse-burst waveforms from a target so that at least one complete burst is included in each dwell of a scanning surveillance fa... | 10/05/1993 |
| 5247310 | Layered parallel interface for an active antenna array A transmit/receive layer is provided adjacent to an array of antenna elements. The transmit/receive layer has an array of transmit receive modules, each module associated with one of the antenna elements. An analog to digital converter and a digital to op... | 09/21/1993 |
