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| Number | Title | Issue Date |
| 7343661 | Method for making condenser microphones A method for making condenser microphones includes: forming a fixed electrode layer structure of a plurality of fixed electrode units; forming a sacrificial layer of a plurality of sacrificial units on one side of the fixed electrode layer structure; forming a diaph... | 03/18/2008 |
| 7329875 | Detector array for imaging system and method of making same A method of manufacturing a detector array for an imaging system, the method comprising providing a pixelated scintillator having a plurality of lost molded pixels comprising a scintillator material adapted to detect radiation. ... | 02/12/2008 |
| 7327309 | Radar scan converter and method for transforming A method transforms an image from polar coordinates into Cartesian coordinates. Therefore, the target image in Cartesian coordinates is subdivided into triangles defined by the vertices given in Cartesian coordinates. The respective polar coordinates are coded into ... | 02/05/2008 |
| 7256532 | Method and apparatus for high voltage gain using a magnetostrictive-piezoelectric composite A method and apparatus attains high voltage gain by using a composite structure of an elastic section of piezoelectric layers bonded between magnetic and electric sections of magnetostrictive layers, with a harmonic magnetic field being applied along the layers at a... | 08/14/2007 |
| 7227925 | Gantry mounted stereoscopic imaging system A radiation therapy treatment machine that has a stereoscopic imaging system, which includes a rotatable open gantry on which is placed a first diagnostic radiation source, a first diagnostic imager, and a therapeutic radiation source. ... | 06/05/2007 |
| 7134342 | Magnetic infrasound sensor A magnetic infrasound sensor is produced by constraining a permanent magnet inside a magnetic potential well above the surface of superconducting material. The magnetic infrasound sensor measures the position or movement of the permanent magnet within the magnetic p... | 11/14/2006 |
| 6977608 | Atmospheric data aggregation and forecasting system An airborne network system (ANS) on a member aircraft receives incoming geo-referenced atmospheric data regarding atmospheric conditions from other member aircraft and can re-transmit the data to other members. An air data system senses local pressure and temperatur... | 12/20/2005 |
| 6947568 | Condenser microphone A back plate having a stationary back electrode is secured to a substrate. A diaphragm electrode is mounted on the back plate interposing a spacer. A frame having a sound collecting hole is mounted on the diaphragm electrode. ... | 09/20/2005 |
| 6937735 | Microphone for a listening device having a reduced humidity coefficient A microphone is constructed to be more tolerant to a wide range of relative humidity conditions without adversely affecting the performance of the microphone. The microphone includes a housing with a sound port for receiving sound and an electret assembly for conver... | 08/30/2005 |
| 6922703 | Methods and apparatus for real-time projection and rendering of geospatially organized data Methods and apparatus are provided for real-time projection and rendering of one or more geospatially organized navigation databases. A system stores, processes, and displays a navigation database (including, e.g., terrain, navigation aids, obstructions, political b... | 07/26/2005 |
| 6798717 | High density pixel array A pixel array device is fabricated by a laser micro-milling method under strict process control conditions. The device has an array of pixels bonded together with an adhesive filling the grooves between adjacent pixels. The array is fabricated by moving a substrate ... | 09/28/2004 |
| 6759769 | Electromechanic film and acoustic element An electromechanic film intended for transforming electric energy into mechanical energy and transforming mechanical energy into electric energy. The film (1) is dielectric and formed of cells (3), the ratio of the height and width of which cells is be... | 07/06/2004 |
| 6708387 | Method for manufacturing condenser microphones A back plate having a stationary back electrode is secured to a substrate. A diaphragm electrode is mounted on the back plate interposing a spacer. A frame having a sound collecting hole is mounted on the diaphragm electrode. ... | 03/23/2004 |
| 6483225 | Ultrasound transducer and method of manufacture thereof The preferred embodiments described herein provide an improved ultrasound transducer and method of manufacture thereof. In one preferred embodiment, a method of manufacturing an ultrasound transducer is provided comprising the acts of supporting a layer o... | 11/19/2002 |
| 6423245 | Piezoelectric ceramic composition for surface acoustic wave device and surface acoustic wave device A piezoelectric ceramic composition for a surface acoustic wave device which can improve the electromechanical coupling coefficient is provided. The piezoelectric ceramic composition for a surface acoustic wave device is represented by the formula Pb... | 07/23/2002 |
| 6307375 | Seismic activity predictor in proximity with the earth including a dielectric for receiving precursor seismic electromagnetic waveforms A method of detecting precursor seismic electromagnetic waveforms and predicting future seismic activity in the form of an earthquake by placing a detector including a dielectric material in contact with the earth. The detector receives at the dielectric ... | 10/23/2001 |
| 6212132 | Three-dimensional radar apparatus and method for displaying three-dimensional radar image Disclosed is a three-dimensional radar apparatus comprising a radar transmitting/receiving unit, a three-dimensional polygon-generating unit, and a three-dimensional graphics unit, wherein a radar transmitter/receiver outputs signals concerning orientatio... | 04/03/2001 |
| 6100697 | Seismic activity predictor in proximity with the earth including a dielectric for receiving precursor seismic electromagnetic waveforms A method of detecting precursor seismic electromagnetic waveforms and predicting future seismic activity in the form of an earthquake by placing a detector including a dielectric material in contact with the earth. The detector receives at the dielectric ... | 08/08/2000 |
| 5748567 | Acceleration sensor An acceleration sensor is based on a semiconductor technique which is suitable for mass production. The resulting acceleration sensor is small in size and high in precision. The acceleration sensor includes a stationary section, an acting section to which... | 05/05/1998 |
| 5742166 | Seismic activity predictor including a dielectric for receiving precursor seismic electromagnetic waveforms A method of detecting precursor seismic electromagnetic waveforms and predicting future seismic activity in the form of an earthquake by placing a detector including a dielectric material in contact with the earth. The detector receives at the dielectric ... | 04/21/1998 |
| 5681986 | Acoustic sensing An improved invasive acoustic sensor apparatus detects particulate matter in a flow by impingement thereon. The apparatus includes an axially extending probe body having an active length positionable in a flow and a distributed piezoelectric transducer di... | 10/28/1997 |
| 5473942 | Acoustic location fixing insect detector A device and a method for locating and counting insects in agricultural commodities has been developed. Acoustic sensors pick up sounds emanating from adult and or larval insects. The electrical outputs of the sensors are amplified and analyzed to determi... | 12/12/1995 |
| 5384753 | Self-orienting seismic detector A self-orienting seismic detector for detecting vertical acceleration regardless of the device's horizontal orientation. The detector comprises a housing fitted with diaphragms capable of generating signals. A mass is internally suspended within the housi... | 01/24/1995 |
| 5307325 | Accelerometer sensor noise reduction method and means In a preferred embodiment, an accelerometer sensor system, including: a housing structure; a first acceleration sensor disposed in the housing structure at a first selected location along the vertical axis of the housing structure, the first acceleration ... | 04/26/1994 |
| 5293353 | Method for manufacturing an acoustic sensor, and acoustic sensor obtained thereby, having a substantially non-detachable protective layer The invention relates to a method for manufacturing an acoustic sensor, and also to the sensor. The sensor comprises a piezoelectric sheet (12) mounted on a support (14) and electrically connected to electrodes (16,18) connected by electrical conductors (... | 03/08/1994 |
| 5268878 | Accelerometer sensor noise reduction method and means In a preferred embodiment, an accelerometer sensor system, having a first axis of rotation at a first given frequency of periodic oscillation thereabout, which accelerometer sensor includes: a first acceleration sensor; a platform to which the first accel... | 12/07/1993 |
| 5230921 | Flexible piezo-electric membrane A piezo-electric flexible membrane is formed by treating a perfluorinated membrane in order to produce a membrane having an electrical resistance greater than 1×109 ohms. The resultant piezo-electric membrane may be used as an ultrasound trans... | 07/27/1993 |
| 5128905 | Acoustic field transducers An acoustic field transducer (10) comprises an elastic membrane (15A) made of piezo-electric material and peripherally held in stretched condition with static strain. A major surface area of the membrane (15A) is free to move in response to acoustic field... | 07/07/1992 |
| 5126980 | Self-orienting vertically sensitive accelerometer A self-orienting vertically sensitive accelerometer is disclosed for measuring a vertical component of acceleration independently of the orientation of the accelerometer. The accelerometer of the present invention includes a spherical plastic shell having... | 06/30/1992 |
| 4937555 | Piezoelectric apparatus and process for detection of insect infestation in an agricultural commodity Detection of insect infestation in an agricultural commodity is provided by piezoelectric means for generating electricity in response to vibration only of a frequency above about 500 Hertz, in vibrational communication with the agricultural commodity. Th... | 06/26/1990 |
| 4928263 | Hydrophones and similar devices An accelerometer-based direction finding and ranging transducer such as a hydrophone uses piezoelectric ceramic as the active material. Orthogonally arranged accelerometers share an inertial mass and resonance control system and the accelerometers togethe... | 05/22/1990 |
| 4899845 | Echographic technique-based method and apparatus to detect structure and anomalies of the subsoil and/or sea bottom and the like An echographic technique based method for prospecting of the subsoil or sea bottom and the like, by means of acoustic waves and carried out by the use of an apparatus constitued, in combination of a known acoustic wave transmitting equipment (1) comprisin... | 02/13/1990 |
| 4884250 | Accelerometer for blast monitoring An accelerometer for blast monitoring comprises at least one piezoelectric transducer having a piezoelectric membrane attached along the edge thereof to the sidewall of a suitable container and mounted for free movement in such container for generating a ... | 11/28/1989 |
| 4864179 | Two-dimensional piezoelectric transducer assembly A piezoelectric transducer assembly for producing sonar signals for transmission underwater and for detecting reflected sonar signals. The assembly includes a two-dimensional generally planar array of piezoelectric elements disposed in an elastomer casing... | 09/05/1989 |
| 4849947 | Acoustic ground vibration detector In an acoustic ground vibration detector for the detection of infrasound ground vibrations, comprising at least one three-component geophone probe, the three individual geophones of said geophone probe are electrically connected in series and act upon an ... | 07/18/1989 |
| 4839872 | Geophone with a sensitive element made of piezoelectric polymer A geophone designed to measure the vibrations of bodies, especially vibrations in the earth's crust, comprises two-strip sensors made of piezoelectric polymer, embedded by one end in the geophone casing and resting freely, by one side, on the inertial mas... | 06/13/1989 |
| 4810913 | Increased sensitivity piezoelectric hydrophones A hydrophone is provided having at least one flexible piezoelectric sensitive element applied to a support, each sensitive element being formed of a flexible piezoelectric film associated with two electrodes and is applied to a synthetic plastic material ... | 03/07/1989 |
| 4755975 | Piezoelectric transducer for transmitting or receiving ultrasonic waves A piezoelectric transducer in which a casing is mounted in a sealing manner on a base member for supporting two rod-shaped terminals, a piezoelectric element is bonded to the inner surface of said casing, and electrodes on the front and back surfaces of s... | 07/05/1988 |
| 4705981 | Ultrasonic transducer An ultrasonic transducer comprises a diaphragm formed by a metal plate provided with a bulged portion in its center and a piezoelectric element bonded to the inner surface of the bulged portion thereby to make the diaphragm vibrate in a bending mode. A no... | 11/10/1987 |
| 4606014 | Acoustic dipole shear wave logging device The preferred embodiment of this invention includes a logging sonde, an elongated pair of oppositely polarized piezoelectric plates connected to each other by their flat surfaces, and an electrical pulse applying means for applying electrical pulses acros... | 08/12/1986 |
